O/T got this OLD socket set. any help with ID ?

This old socket set came from my grandfathers friend who used to be a mechanic in the good ole days.
The strange thing is the 6 point allen drive with a pin in the center , rather than a square drive. no markings at all. any ideas on the maker or the approx. year?? I'm guessing 1920's

thanks

 

Try www.alloy-artifacts.com

 

Thats a great website ! thanks John

 

I'm thinkin the ruler is from Home Depot.
Sorry......

 

no markings or names on them?

Could well be Indestro - lots of their socket stuff was hex based and lacked a company name.

 

try garage journal with the tool forum.they ID a few old tools I had, within aa few minuites of postingl. garagejournal.com

 

No, it is, however, a very good qulity repro.