I used to be really into numismatics, before I had kids, retired and got poor. I tend to think of the hobby as a pursuit of rarities, rather than a study of money. I've acquired most of it through Bowers and Ruddy, who I kept an open account with for several years when I was making great money in music. They had carte blanche to acquire 20 Century rarities on my behalf. Any dupes or dull acquisitions they just auctioned off again, usually at a profit.
I have a fairly substantial collection of US type in high grades, all the 20th century issues including many proofs, some are quite rare, now. I have focused on completing AU collections of modern coins, with as many proofs as I can find. I have very few proofs from the 19th century and no complete collections, except Barber Dimes, Indian Head cents, 3 Cent nickel and silver. I only have a few pieces of gold.
To behold a Walking Liberty proof is an amazing experience, but to own one is a rare privilege.
Yeah I dig this stuff!!
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It's just music for me. The other stims don't work.