Hi fellows I'm not new to guns but am a pup on the subject of DETONICS I have owned several over the years but think I'll keep the one I just aquired it is a DETONICS ASSOCS. SEATTLE WA. pistol the serial # has an I with a space then it is in the 6200-6500 range is the I to designate that the pistol is a mark 1 or does it have another meaning also what is it worth it is in 98% condition with the black rug and owners manual. Oh yeah it is a blue gun. Is it carbon steel or stainless?

Thanks in advance

Jim Socks