1971 s penny

[kramden]

Is there anything else to look for on a 1971 s dd obversr

[Greenstang]

There are different DD Varieties for each MM. You will have to check with Wexlers or CONECA to check for them. Too numerous to list here.

[Just Bob]

Your title and post seem to refer to "S" mint coins, but the only doubled die obverse coins from San Francisco shown on Variety Vista are proofs. (Wexler shows one business strike, but the doubling is so minor as to be insignificant). Your coins are all business strikes, and are not from San Francisco. But, if you want to look at, and compare your coins to, the doubled dies listed for 1971, here is a link:

http://www.varietyvista.com/01b LC Doubled Dies Vol 2/DDO listing.htm