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:

 

[Oilit]

I finally ran across one of these Monarks with the caliper brake and it's nearly identical to @Gordon 's bike, except not nearly as clean. The ad for the Bearcat shows a bike with calipers that could be Weinmanns, so it's a mystery why Monark went with these. Maybe with everybody jumping on the caliper brake multi-speed bandwagon there weren't enough to go around and these were easier to get. That's my best guess, anyway.
The first picture was from the seller's listing. The head badge decal is nearly gone but it looks like it may have read "Silver King", like the chain guard.

 

[Oilit]

This is an old catalog page the seller sent me, evidently this was the "Royal Gold Crown" model. Does anybody know what catalog this may have been out of?