Unfortunately there are many mistakes in Harrison's book. Number 14 has long been recognized as an error and is not found on legitimate RMC stocks. It's pattern has been duplicated by the fakers as well. The vertical RMC cartouche above posted by Brian Q, would be correct. RMC made many stocks for different prime contractors. They were known for their stock making expertise. I have an early QHMC with RMC in the sling well and the larger crossed cannon acceptance stamp on the right side next to the I-Cut.