Going through my revenue documents and I was wondering what the earliest know date of usage for the RM3 is. It was first issued on May 1, 1755. The document I have is June 10, 1755. Volume 1 of Combs book "U.S. Embossed Revenue Stamped Paper" starts at 1798. The earlier revenues are from the colonial period, this one is from Massachusetts. Looks like I need another reference book in as I have several from this period.

