Bank check, 6.5 x 2.75, filled out in another hand and signed “Calvin Coolidge,”payable to Coolidge for $25.00, October 15, 1917. Coolidge has added his endorsement signature on the reverse. Encapsulated in a plastic PSA/DNA authentication holder. In fine condition, with expected bank cancellation holes affecting the endorsement, and slight show-through from bank stamps on the back. RRAuction COA.