How to read a mintage figure without being misled

Mintage is the first figure most listings quote and the one buyers remember. It is published, it is easy to compare and it sounds decisive. It is also, on its own, a poor guide to how scarce a coin actually is in the condition you are being offered.

What a mintage figure actually counts

A mintage is the number of coins a mint authorised or struck for a given issue. Depending on the source it may be the authorised maximum, the number actually produced, or the number sold. These are not always the same, and for modern issues the difference can be significant when an edition does not sell out.

What a mintage never tells you is what happened afterwards. Coins are melted, damaged, cleaned, lost and spent. For older issues the attrition is enormous: a large proportion of Victorian sovereigns were melted during the twentieth century, so the surviving population bears no fixed relationship to the number struck.

Population reports and why they matter

Both NGC and PCGS publish population reports showing how many coins they have graded for each issue and how those grades are distributed. For a modern proof, where nearly every surviving example has been submitted, this gets close to a real census.

Consider two issues with an identical mintage of five thousand. The first has four hundred graded PF70, the rest spread across PF68 and PF69. The second has twelve at PF70. The headline number is the same. If you want a PF70, the second coin is roughly thirty times harder to find, and the market prices it accordingly.

The limits of population data

Population reports are useful but they are not a clean count, and it is worth knowing how they distort.

• Resubmissions inflate the numbers. A coin cracked out and resubmitted in the hope of a higher grade is counted again, and the old entry is only removed if the holder label is returned.
• Ungraded coins are invisible. For a bullion issue where most examples were never submitted, the report reflects submission behaviour rather than the surviving population.
• The two services are not interchangeable. NGC and PCGS numbers should be read separately, not added together.
• Popular issues are over represented, because coins people expect to be valuable are the ones that get graded.

None of that makes the reports useless. It means they are best used comparatively, between similar issues graded by the same service, rather than as an absolute count of what exists.

Three questions worth asking

When you are comparing two listings, the mintage alone will rarely separate them. These will.

• What is the mintage for this specific weight and finish, not for the issue as a whole?
• What is the graded population at this level, and at the level above it?
• Is the coin still sealed in its original holder, and what is the certification number?

A seller who deals in graded coins will have all three to hand. If the second question produces a vague answer, that is itself information.

Mintage and population describe scarcity. Neither is a statement about value, and nothing here is advice on buying, selling or holding coins.