what’s the difference between a proof coin and a bu coin? Bu is worth more, correct? And how to tell the difference between them.
Welcome to CT! Brilliant Uncirculated (BU) coins are business strikes that have never entered commerce. They are new, "mint state" coins with minimal damage. Proof coins are specially struck for collectors. They are often made with specially prepared dies and polished blanks. They may be struck multiple times to impart great images. In general, proof coins are considered to be superior to BU coins in strike and appearance but may not always be the more expensive. Rarity always trumps all else, so a truly rare uncirculated coin could command a higher price than a relatively common proof version.
The term "proof" is a method of manufacture. The term "BU" or "Brilliant Uncirculated" refers to the condition of the coin. Generally, proof coins are produced on polished planchets and dies and produce a mirror finish. The hammer die strikes the planchets at least twice to ensure a sharp relief. Coins intended for circulation are struck just once. Coins that are produced for circulation and grade MS68-MS70 will usually garner a higher premium because they are so much rarer than PF69-PF70 coins, which are becoming more and more common with the latest production refinements. Of course, you must still factor in the low mintages that often accompany special proof issues. Chris
In addition to the good advice above, I could add...proof coins will have a mirror like field or background and the lettering and numerals will have a frosted look ( on most modern proofs ) and the rims will appear more "squared" ( because of the multiple strikes ) instead of the more rounded look of business strikes. Older proof coins may not have the frosted looks as the dies get older though.
