Can Anyone Help Me Identify These Cut Outs With "M.c." On Them.

Any help would be appreciated.

MC is Member of Congress, also, USS is U.S. Senate or U.S. Senator, VP is Vice President, etc. The printed facsimile signature is their "free frank" to send mails.

Cut-outs like this have little value, but can be interesting.

To paint with a very broad brush, some entire envelopes from the more famous members have some value and the (let's say) pre-1900 ones are often actual signatures which command prices based on the autograph market.

Here are some "entires" in a thread I did several years ago:
http://goscf.com/t/51608

Biographies of all these can be found in the printed "Biographical Directory of the United States Congress, 1774-" or through the on-line version:
https://bioguide.congress.gov/

Thank you John appreciate the information.