Rockwell 772 Extra Heavy Duty Fastener Driver

by Marshall
(Texas)

I work at The Home Depot. Yesterday, a customer brought in a screw gun asking if I could figure out how to get the bit that was in it out. I started looking at it to see what I could figure out, and realized it was an extremely old Rockwell. The serial number plate was stamped with the Rockwell Manufacturing logo that was used in the early 50's. It said nothing about Delta, and appeared to be made before any of the mergers that started in the mid-40's. After doing some research, I found out that logo was actually first used in the early 40's. However, I cannot find anything anywhere on the internet about this particular tool. Has anyone ever heard of it or know where I might be able to find out more about it? I have the serial number, and the guy's contact information. We have both gotten very interested in the history of this driver since it seems to be so hard to find and possibly such an extremely rare tool.