What kind of brakes are these?

[Oilit]

Here's a thread on some caliper brakes from Musselman, not the same, but close:

Musselman Caliper Rim Brakes | Classic Balloon Tire Bicycles 1933-1965

I have these NOS Musselman Caliper Rim Brake parts with instructions and part of the original box. Does anybody know for sure when these were produced and sold?

thecabe.com

 

[Oilit]

@Gordon, I think this settles it. A 1954 (by the hub) Monark Bearcat, for sale in Lakeside, Oregon (on Etsy).

 

[Gordon]

@Gordon, I think this settles it. For sale in Oregon on Etsy.

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Yup, as far as I am concerned it was a factory addition to their multispeed models. Thanks for your research.

 

[Oilit]

For future reference, I should have included these last night. Hub dated May 1954: