I have a sterling silver 1987 Falkland Islands PROOF £1 coin in a case. Krause does not make it clear how to distinguish the silver "proof set" strike and the silver "Piefort" strike, catalog numbers #KM-24a and #P-1 respectively. I have no means of weighing the coin. What made me ask was a listing on eBay, which supposedly offered the more common Proof Set strike, but it was in a different-color (green, official Falklands) case than mine (brown, official Falklands), which made me think my coin might be the more-valuable Piefort. The key question is, what are the thicknesses of the two coins? It doesn't do any good for someone to say the Piefort is twice as thick, because I have nothing to compare it to. I need millimetres! Any help will be appreciated.
Well, the regular coin weighs 9.5 g , and the piedfort 19.0g. The thickness of a regular £1 (UK) is 3.15mm, and the Falkland Island £1 has the same specification. Thus (at a guess), the piedfort is 6.3mm.
I just measured my coin, and it is in fact just a hair over 3mm, so I guess it is not the Piedfort. Thanks for providing a reference number. It will be listed For Sale tomorrow, as part of my clearing out of foreign proof sets.
