I just stumbled across this forum a couple of days ago and find it very interesting.
Now I have a question. I have a Shaeaffer cartridge pen dating from about 1966. Black body, white gold cap with yellow gold ring and pocket clip, marked lifetime. The nib is inlaid into the body and has a cutout with an elongated diamond shaped black piece in it.
Dad was in the office equipment/supply business then and was a Shaeffer dealer. What model do I have, and more importantely is there a converter available where I can fill it from bottle ink. He got it for me while I was in college, along with the matching pencil
Thanks
J J King