Hey guys I have a colt 1911 s/n dates it to about 1968. I replaced the grips it came with to ne pachmyer wood/rubber grips. When taking the old ones of I noticed beckelhymers stamped in the back. Anyone ever heard of them? Are they special? As far as I know they guy I got it off of kept it stock except the sights. Any help would be great. Thanks for any info.