List of Keys / Semi-Keys

[jpolz]

Does anyone know where can I find a relatively complete list of key & semi-key dates for various types?

 

I'm thinking of creating a kind of Signature set / type set focused on keys / semi-keys.

[Just Bob]

I would use the Red Book.

[James_OldeTowne]

Are you referring to "type coins"? or a list of keys within each type?

 

For a Dansco 7070, as an example, there are really only three keys, and one semi-key.

 

Your question is somewhat subjective, since of course whether a coin is a key in a type set is a function of it's grade and the financial resources of the collector.

[WinstonWare]

Type set is tough enough if you ask me

[bsshog40]

The PCGS guide also lists different keys.

[jpolz]

Thanks all - bsshog40 that's a good suggestion. I'd already been looking through the NGC Coin Encyclopedia, and Guth's US Coinage A Study By Type.