Calvin Coolidge’s personally–owned gold-colored stickpin, approximately 2″ long, mounted with a small cabochon opal at the head. Includes an ALS from his son transmitting the pin, signed “John Coolidge,” one page, 8.5 x 11, Plymouth Cheese Corporation letterhead, February 26, 1976. In part: “I am sending you a stickpin that belonged to my father. We do not have much to give away now as we have given most everything pertaining to my family to the state of Vermont for exhibit in the Calvin Coolidge Memorial in Plymouth.” In overall fine condition. RR Auction COA.