Thats a beautiful cabinet , id imagine those would fetch a pretty penny here.As advanced as US coin collectors seem to be i havnt seen anything like those mahogony cabinets. The most popular method here is Dansco albums , people keep coins of extreme high value in those , i use them as well although i havnt anything all that valuable. Air tite capsules are also popular , i use those as well for gem bu's and unc's. Its a good point about the interior not being varnished , without doubt the chemicals involved would "tone" a coin , toning fetches a high premium here which i dont totally understand , its easily faked ..yet they buy them up at much inflated prices. Which brings me to an observation ive long had but never was clear why it is that so many old US coins are toned , some even like a rainbow others a golden bronze..some people like those. But looking at old British coins the toning is rarely if ever there.It seems true of other countries coinage as well , so why is it only the US coins achieve this startling level of toning do you think ? Metal composition is slightly different as pre 1920 UK silver was purer than US , is this why is all i can think.