Charlie, Check CC newsletter353-6. I have Inland serial number 3,002,xxx that has T1 stock marked RMC with a Inland Crossed Cannon stamp and P in circle on the bottom of the grip. It has the / in the slingwell like the one you show but does not have any markings in the barrel channel as noted in the newsletter. According to the newsletter the serial # range is 2,921,589-3,027,3xx. John