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In an earlier thread, common planchets, I was interested different coins on exactly the same planchets, there is some overlap, but this is not that.
By common module, I mean coins of different countries and mints, struck to the same specifics, often not in every detail, and to the same denomination, to provide interchangeability, like the Euro, around a region of neighboring states. The Euro is an obvious field of this idea, but also the Latin Monetary Union of 1865-1918, which is my main area of study. the Scandinavian decimal coinage also comes to mind.
To start with here is a collection of 20 cent. coins of different participating states in the LMU coinage, 1892-1916.
The 20 Heller/Filler/Lepta/Para/Rappen/Stotinki/Centesimi is nominally a module of 21 mm, 4 grams, of nickle or copper-nickle alloy.
This is nearly a complete set of 20 cent types. Anyone know any I am missing?
The Swiss are still issuing this coin on this module.
There is actually considerable variation between the coins, both in alloy and actual dimensions, and about half have milled edges.
N#177
N#2390
N#10038
N#10206
N#6263
France, Belgium, Romania and Spain never issued 20 cent coins on this module.
