Understanding Haxby Rarity
Once a collector has identified a Haxby die pair, the next question is often practical: how difficult is this attribution to find? The Haxby rarity scale was created to answer that question for the 1859 Narrow 9 die-pair catalogue.
1. What Does the Haxby Rarity Rating Measure?
For the specialist 1859 Narrow 9 catalogue, the Haxby rarity rating measures the relative scarcity of a particular obverse-and-reverse die pair. It does not grade the coin, assign a dollar value or measure eye appeal.
The researchers had no surviving production records showing how many coins were struck by each die pair. Instead, rarity was estimated by studying how frequently each pairing appeared in a large sample of surviving coins and by observing availability in collections and on the market over time.
The published rarity study examined 4,806 examples of the 1859 Narrow 9 cent, ranging from Good through Uncirculated, and assigned relative rarity ratings across the known die pairs.
2. R-1 Through R-10 in Practical Collector Language
The original study defines R-1 as very common and R-10 as a die pair represented by a single example known to the researchers. For a new collector, the scale is easiest to understand in terms of how difficult a coin may be to locate.
| Haxby rating | What it means in practice |
|---|---|
| R-1 | Very common. These are the easiest Haxby die pairs to find. A collector actively searching 1859 Narrow 9 cents should encounter examples readily. |
| R-2 | Common to less common. Still readily obtainable, although usually encountered less often than R-1 material. |
| R-3 | Scarcer. Examples can be found, but some patience and searching may be required. |
| R-4 | Scarcer still. These pairings are encountered noticeably less often than the common groups. |
| R-5 | Rare enough to require deliberate searching. Finding an unattributed example can be a meaningful discovery. |
| R-6 | Quite difficult to find. The published study treats R-5 and R-6 pairs as roughly twice as scarce as the R-3 and R-4 group overall. |
| R-7 | Very rare. These die pairs are seldom seen in any grade. |
| R-8 | Extremely rare. Opportunities to acquire or even examine an example may be infrequent. |
| R-9 | Exceptional rarity. Only a very small number of examples are known or observed. |
| R-10 | One example known to the researchers at the time of rating. If another example is confirmed, the catalogue states that the pairing moves from R-10 to R-9. |
The descriptions above translate the published Haxby rarity study into practical collector language. They should not be read as fixed population counts for R-1 through R-9.
3. What the Study Says About Availability
The researchers grouped the ratings into practical availability bands. R-1 and R-2 die pairs were described as readily available. R-3 and R-4 were scarcer but generally obtainable with patience. R-5 and R-6 were about twice as scarce as the preceding group, while R-7 through R-10 were expected to be seldom encountered in any grade.
The sample itself shows how sharply scarcity increases at the upper end. Of the 4,806 coins studied, 61% belonged to the 58 most common die pairs. By contrast, only 1.5% belonged to the 37 die pairs rated R-7 through R-10.
For a new collector: an R-1 is something you can reasonably expect to find. An R-7 may require a long search. An R-10 may be effectively unavailable unless the known specimen changes hands — or another example is discovered.
4. Rarity Is Not the Same as Grade
A rarity rating tells you how difficult the die pair is to find. Grade tells you the physical condition of an individual coin. Those are separate questions.
A common R-1 pairing can be difficult to locate in a very high grade, while a rare pairing may survive mostly in lower grades. The published Haxby rarity study specifically notes that it does not attempt to measure the difficulty of finding each die pair in higher grades or the rarity of individual die states.
5. Rarity Is Not the Same as Value
Rarity can influence market value, but it does not determine value by itself. Price also depends on condition, collector demand, eye appeal, certification, market awareness and other factors.
A superb high-grade example of a relatively common die pair can sell for more than a lower-grade example of a considerably rarer pairing. Likewise, an exceptionally rare die pair may remain modestly priced if only a small number of specialists actively pursue it.
For that reason, the notation R-7 should be read as a statement about scarcity — not as a price guide.
6. Haxby Rarity Can Change
The Haxby rarity scale is based on observed evidence, so it is not permanently fixed. New coins continue to surface in collections, dealer inventories and auctions. When additional examples of a rare pairing are confirmed, the evidence for its scarcity changes.
The catalogue gives the clearest possible example: an R-10 die pair is moved to R-9 as soon as a second example becomes known to the researchers.
The rarity study also acknowledges that some well-known die pairs can be over-represented in specialist collections simply because collectors have recognized and saved them for years. The authors adjusted some ratings to compensate for this effect.
Research principle: rarity ratings summarize the evidence available at a particular time. Better evidence can refine the rating.
7. Three Different Meanings of “Rarity”
The word rarity is often used generally in numismatics to describe how scarce or difficult a coin is to obtain. That broad idea should be separated from two specific systems discussed on CoinData: the Haxby Rarity rating and the CoinData Rarity scale.
A descriptive numismatic concept. A collector may call a coin common, scarce or rare based on how frequently it survives or appears in the market. Unless a particular published scale is named, these words do not by themselves represent a Haxby or CoinData rating.
In the specialist 1859 Narrow 9 study discussed here, an R-1 through R-10 rating estimates the relative scarcity of a specific Haxby obverse-and-reverse die pair.
CoinData uses its own five-level star scale for the coin or variety represented by a CoinData record. It is a separate, broader collector-oriented assessment and is not derived from the Haxby R-1 through R-10 scale.
Keeping the terminology explicit prevents a statement such as “this coin is rare” from being mistaken for either a formal Haxby rating or a CoinData rarity classification.
Haxby Rarity vs. CoinData Rarity
A collector using CoinData may encounter both a Haxby Rarity rating and a CoinData Rarity assessment. They should not be treated as interchangeable scales.
Haxby Rarity
In the 1859 Narrow 9 catalogue, this measures the relative scarcity of a specific obverse-and-reverse die pair.
Question answered: How difficult is this Haxby die pairing to find?CoinData Rarity
CoinData’s rarity assessment applies to the coin or variety represented by the CoinData record and is intended as a broader collector-oriented indication of scarcity.
Question answered: How scarce is this CoinData coin or variety in its collecting context?| CoinData rating | CoinData description |
|---|---|
| ★★★★★ | Extremely Rare — Few examples known |
| ★★★★☆ | Very Rare — Difficult to locate |
| ★★★☆☆ | Rare — Infrequently encountered |
| ★★☆☆☆ | Scarce — Collected with effort |
| ★☆☆☆☆ | Common — Readily available |
These stars are the CoinData rarity scale. They are not shorthand for Haxby R-numbers and should not be converted into them.
This distinction matters because a broader CoinData variety can contain several different Haxby die marriages. The variety as a whole may be obtainable, while one particular die marriage inside it can be extremely difficult to locate.
The reverse can also occur conceptually: a coin may be important or scarce in the broader CoinData framework even though a particular Haxby pairing within the applicable specialist catalogue is not among the rarest die marriages.
8. Why Haxby Rarity and CoinData Rarity Can Both Be Correct
Suppose a collector sees a CoinData record for an 1859-cent variety and also sees a Haxby attribution carrying a rarity rating. The two labels may describe different levels of the same coin’s identity.
The CoinData record can describe the broader variety being collected. The Haxby attribution can then identify the exact die marriage that produced the particular specimen. If that exact marriage is unusual, its Haxby rarity can be much higher than the broader variety’s CoinData rarity assessment without any contradiction.
The simplest way to remember it:
Haxby Rarity: “How hard is this specific die pairing to find?”
CoinData Rarity: “How scarce is this coin or variety in the broader CoinData reference system?”
9. Rarity Is a Research Tool, Not Just a Collecting Score
The real value of the Haxby rarity scale is that it helps researchers understand the surviving population of 1859 Narrow 9 die pairs. It points collectors toward common material suitable for learning attribution, identifies pairs that require more persistent searching and highlights the die marriages for which every newly discovered specimen can materially improve the record.
The original study even notes that additional, still-undiscovered die pairs may exist. That possibility is part of what makes systematic attribution useful: a collector studying an ordinary-looking 1859 cent may contribute evidence that was not previously recorded.
10. Completing the Haxby Guide
Across these three pages, the Haxby system can be reduced to three straightforward ideas. First, a catalogue attribution gives a collector a shared way to identify what has been found. Second, specialist die research can identify the exact obverse-and-reverse pairing responsible for a coin. Third, the Haxby rarity rating estimates how difficult that pairing is to find based on the surviving evidence.
CoinData preserves Haxby information as an external numismatic attribution while maintaining its own CRN and rarity framework. Keeping those systems distinct allows older and specialist scholarship to remain visible without implying that different rarity scales measure exactly the same thing.
Sources and Further Reading
This CoinData article is an original explanation of the published Haxby rarity study and its relationship to CoinData terminology. Source material has been summarized and restated rather than reproduced.
Haxby rarity study: Randy Mason and Dr. James Haxby describe the 4,806-coin study, the R-1 through R-10 scale, practical availability bands, sampling limitations and the treatment of newly discovered examples. Read the original rarity article ↗
Haxby catalogue: the specialist catalogue explains that its PC59 catalogue numbers identify specific obverse-reverse die combinations. View the Haxby numbering guide ↗
Collector identification guidance: the catalogue FAQ discusses attribution, die states and the continuing possibility of discovering rare or previously unrecorded material. View the catalogue FAQ ↗
Courtesy link — Royal Canadian Numismatic Association: collectors wishing to explore Canadian numismatics more broadly can visit the national association. Visit the RCNA ↗