What Is a Haxby Number?
A Collector’s Guide to James Haxby and Canadian Coin Varieties — Part 1 of 3
If you have encountered the word “Haxby” while researching a Canadian coin and wondered what it means, you are not alone. The name belongs to one of the researchers whose work helped generations of collectors identify, classify and understand Canadian coins and their varieties.
1. Start With the Name
James A. Haxby is a Canadian-born numismatic researcher and author whose work became closely associated with the systematic study of Canadian coins, dies and varieties. For many collectors, his name is most familiar through Coins of Canada, a long-running reference catalogue associated with Haxby and fellow researcher Robert C. Willey.
The first edition of Haxby’s Coins of Canada was published by Whitman in 1971. Later editions continued the work under Unitrade Press, and the title has remained in publication for decades. The enduring use of the catalogue is one reason the Haxby name continues to appear in Canadian numismatic research.
For a new collector: when you see “Haxby” beside a Canadian coin, think of it first as an attribution reference — a way of connecting the coin to published or specialist research about its type, variety or dies.
It is not a grade, certification number or CoinData CRN.
2. Haxby Was a Researcher Before He Was a Number
Haxby’s importance goes beyond having his name attached to a catalogue. Contemporary records show that in 1973 he was appointed Deputy Curator of the National Numismatic Collection at the Bank of Canada. At that point he was already known for extensive writing on Canadian numismatics and had received the Canadian Numismatic Research Society’s literary recognition for research on Canadian decimal coins.
His research interests extended well beyond circulation coin varieties. His work included Canadian government paper money, Newfoundland coinage, banking history and the history of the Royal Canadian Mint. The Royal Canadian Numismatic Association later recognized this broad contribution when it presented Haxby with the J. Douglas Ferguson Award in 1998 for distinguished service to Canadian numismatics.
In the late 1970s, Haxby’s contribution to numismatic education was also formally recognized.
3. What Does a Coin Catalogue Actually Do?
A basic coin catalogue may list a denomination, date, mintage and approximate value. A specialist catalogue can go much further. It may separate varieties that were made by different dies, identify small design differences, record known die pairings, and document changes that occurred while a die was in service.
This is where attribution becomes important. Two coins can both say 1859 ONE CENT and yet have been struck from different combinations of working dies. To a casual observer they may look nearly identical. To a specialist, the lettering, date, leaves, punches, cracks or other repeating features can reveal which dies made them.
4. Four Terms You Need Before Going Further
You do not need to be a specialist to understand Haxby attribution, but four basic terms make the rest of the subject much easier.
The front or portrait side of the coin. A working obverse die carries the design that will create this side when the coin is struck.
The opposite side of the coin, commonly carrying the denomination, date or other principal design. A reverse die creates this side.
A hardened working tool carrying the coin design in negative form. The obverse and reverse dies come together under pressure to strike the planchet.
The particular obverse die and reverse die used together. Collectors also call this a die marriage. A die can sometimes be paired with more than one die on the opposite side during its working life.
A die state describes how a particular die changed while it remained in use. Cracks, wear, polishing or other changes can help specialists place coins in a sequence even when they were struck by the same basic die.
5. Why One Date Can Have Many Attributions
A mint needs many working dies to produce large quantities of coins. Dies wear, crack, are polished, are removed from service and are replaced. An obverse die and a reverse die do not necessarily begin or end service at the same moment.
That means one obverse die may be used with one reverse die and later appear with another. The resulting coins share one side’s working die but not the other. Careful study of those relationships can reconstruct part of the manufacturing history that is invisible if every coin of the same date is treated as identical.
This is one of the most useful ideas behind specialist Haxby attribution: the coin itself preserves evidence of the tools that struck it.
6. A First Look at Haxby Numbering
The most detailed modern example is the specialist Haxby catalogue for the 1859 Province of Canada large cent. In that system, each catalogue number represents a particular obverse-and-reverse die combination.
PC59 identifies the Province of Canada 1859-cent series. The number after the hyphen identifies a particular die pairing within that catalogue.
Other entries pair different obverse and reverse dies, and some individual dies are known with several partners. This is important because the number describes the relationship between both sides, not simply a mark or feature on one side of the coin.
An important qualification: “Haxby” is used in more than one numismatic context. The specialist PC59-# system for 1859 cents should not be assumed to be the format used for every Canadian denomination, date or Haxby reference. CoinData therefore records Haxby information as an external attribution rather than inventing or extrapolating Haxby numbers.
Part 2 of this guide will follow actual obverse and reverse die relationships and show why the same die can appear in several catalogue pairings.
7. Why Attributions Can Change
Catalogue research is not frozen in time. A newly discovered coin may reveal a die pairing that had not previously been recorded. A sharper specimen may expose a diagnostic feature that was invisible on worn examples. Die-state study can also show that two supposedly different dies are actually different stages of the same working die.
When the evidence changes, responsible cataloguing changes with it. Specialist 1859-cent research continues to refine die relationships and, where necessary, catalogue numbering. That does not make earlier work useless; it shows how numismatic knowledge develops as more evidence becomes available.
This is also why CoinData treats a Haxby attribution as research information attached to a coin record, rather than as a substitute for CoinData’s own CRN identifier.
8. Haxby and CoinData
CoinData uses the CRN to identify records within the CoinData database. A Haxby attribution serves a different purpose: it connects a coin to an established body of numismatic classification or die research.
When both appear on the same CoinData record, they should therefore be read together rather than treated as competing numbers. The CRN tells you which CoinData record you are viewing. The Haxby information tells you how the coin relates to an outside attribution system or specialist die study.
The same principle applies to rarity. Haxby rarity and CoinData rarity are not interchangeable scales. Part 3 of this guide explains why a Haxby R-1, R-5 or R-10 describes something different from CoinData’s broader collector-oriented rarity assessment.
A Short Haxby Timeline
- 1969Haxby receives the Canadian Numismatic Research Society’s literary recognition for research on Canadian decimal coins.
- 1971The first edition of Coins of Canada by James A. Haxby is published by Whitman.
- 1973Haxby is appointed Deputy Curator of the National Numismatic Collection at the Bank of Canada.
- Late 1970sHaxby receives recognition for his contribution to numismatic education.
- 1998The Royal Canadian Numismatic Association awards Haxby the J. Douglas Ferguson Award for distinguished service to Canadian numismatics.
- TodayThe Haxby name remains part of Canadian numismatic literature, while specialist research continues to refine particular die and variety attributions.
Sources and Further Reading
This CoinData article is an original explanation based on published numismatic and institutional sources. Historical facts have been restated in CoinData’s own language rather than reproduced from catalogue descriptions.
Canadian Numismatic Research Society: a contemporary February 1973 notice records Haxby’s appointment as Deputy Curator of the National Numismatic Collection and summarizes his earlier research recognition. View the archival CNRS record ↗
Coins and Canada: bibliographic records document the 1971 first edition of Coins of Canada and the publication history of later editions. View the publication record ↗
Specialist 1859-cent research: the current Haxby catalogue of the Canadian 1859 large cent explicitly defines its PC59 catalogue numbers as specific obverse-and-reverse die combinations. View the specialist Haxby numbering guide ↗
Courtesy link — Royal Canadian Numismatic Association: the RCNA records Haxby as the 1998 recipient of the J. Douglas Ferguson Award and summarizes the breadth of his contribution to Canadian numismatics. Visit the RCNA Ferguson Award page ↗