are the 79-S and 81-S type 2 mint marks known only for proofs?

...i don't think i've ever heard any reference to circulated type 2 varieties of this coin, only the proof dollars.

"government is not reason, it is not eloquence-it is a force! like fire, it is a dangerous servant and a fearful master; never for a moment should it be left to irresponsible action." George Washington
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I firmly believe in numismatics as the world's greatest hobby, but recognize that this is a luxury and without collectors, we can all spend/melt our collections/inventories.
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...thanks, julian. i'll stop searching rolls immediately!! providing i ever find rolls of SBA's at the bank or in change.