Browning Tool Company (Bozeman, MT)
Research continues on the founding and final disposition of this company. They appear to have started just after the end of WWII. An article from the 2/1/1947 edition of the Great Falls Tribune indicates Roe V. Browning is the plant manager, and the tools are being manufactured by the Badgely Machine Works.
Here is a link to a forum thread on The Garage Journal with the tool having been discovered by 3BayGarage.