What do you know about them?
What I've heard is:
Produced in San Diego CA in the 50s, last year 1960. Owned by one of the Gordon glass brothers and Frank Eicholtz (the "G" and "E" in Gelco). Who was the "L", if anybody?
I have three and like them a lot! They are great shooters! Smooth, fast, and quiet in my hands anyway.