Hello all, not mine but a friends... This very unusual and nicely made Thread Die set has 4 sets of interchangeable dies giving a total of 14 thread sizes from 1/4 to 3/4 , both fine and standard thread forms, plus 1/8 NPT. Marked .. Zoerman Company, Jackson Mich USA,  Pat'd Aug 1922. Very nicely made, handles flip out and lock for use then fold for storage. Ever seen one like it?

Joe B

 NO, I have never run across a set like that,  1922 and still complete ???

thanks for sharing. very interesting.

Very nice. Have never seen one like that before.  here's the patent https://www.google.com/patents/US1426441?dq=19+aug+1922+thread+dies&hl=en&sa=X&ved=0ahUKEwiG2bH3zNLOAhVCNiYKHb4wDewQ6wEIQDAF

Crazy. That thing must have been expensive as heck to produce. I love it!

Wow, new to me, awesome find and other than the box it looks to be in good condition with all of the original pieces.