Worn down?

I have just purchased a collection of UK silver coins dated from 1920 to 1946, which included 200+ halfcrowns.

I tried to count them by making a single pile of 16 coins (£2 face value) and then simply stacking similar-sized columns next to it.

Total failure !! .....as the wear from circulation is so great on some coins that size definitely mattered.

Both piles have 16 coins, but the rigours of use have quite literally worn away the equivalent of a whole coin when compared to the other stack. Vapourised into the history of wallets, tills, purses and human hands I suppose.