I pride myself on my pattern recognition skills, but can't for the life of me discern the reasoning behind most countries' coins having KM#'s but some having Y#'s ... and are there any others, besides PS#'s for Proof Sets?
The letters indicate where the original attribution for the coin came from. KM is Krause Mishler, Y is Yeoman, C is Craig, FR is Freidberg, P is Pridmore, V is Valentine, K is Kann and Su is Hsu.
Give it a couple more years and all you'll have is KM numbers. They are moving away from all the other numbers and assigning KM numbers to every coin.
Hey, thanks. I picked up a 1962 copy of R. S. Yeoman's "Modern World Coins" at a coin club meeting last month -- it's nice to know the link to the "Y" catalog numbers. My two main wishes along these lines are: 1. Don't change the catalog numbers -- seeing notes such as "previously km#33" in the catalog make me afraid of the maintenance involved with keeping my own collection in sync. 2. Create a combined, searchable key including both Country and Catalog # which would allow searching on the web for a single term such as "Panama-KM13" for the Balboa minted between 1931 & 1947, for instance.
