Sioux Bear Alignment Cabinets

Bear sold these Saftey Service workbenches for about 5 years starting in 1949.
Were they built by Sioux?

I have only seen three examples of this cabinet alive today, and none of them have an intact Sioux ID plate.

Even though I have never found ads mentioning a manufacturing company and the handles are a different shape than the earlier Sioux Valve service benches, I still fully believe these benches were built by Sioux Tools.

 

Early Style- present on all Sioux Valve Service Cabinets

Bear knob

 

The details that point me towards this are;
The Bear has the same wide edge wrapped worktop, ribbed trim, and top window box design. I have also been unable to find proof of Sioux producing their Valve Service cabinet after ‘49.

UPDATE: I found a later 50’s Sioux cabinet that has these later model knobs on it. I feel concrete about this now.