Garage sale cabinet

[jimwrench]

 Got a little 3 drawer cabinet at garage sale today. I just manned up and paid the asking price. I think there are 13 burrs, 2 wire guages,and a pair of stair clamps plus a lot o other items. the one that I'm not familiar with is the Stifbak bolt,nut & wrench gage. Anyone familiar with this gage or the company that made it . Back looks like it was made of brass. When I tried to investigate it windows corrected my spelling and told me what I needed to do for my stiff back

[rusty]

Modern machine shop: Volume 19 ; 1946

"Stifbak" Bolt and Nut Gage A unique gage whereby inexperienced workers can determine the proper size of wrench to be ...
...the trade name of "Stifbak" by the Read Machine & Tool Co., 4714 Huntington Dr., S., Los Angeles 32, California.

The circular gages are nice too:)

[jimwrench]

 Thanks Rusty, your research capabilities are fabulous.