Found something for the fur trade forum and some brokes

[bcarmack1]

 

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[Indian Steve]

Nice Relics! The trap is modern though.

 

[bcarmack1]

Ok cool its probably only 50 years old or something

 

[iowa trout]

330 conibear commonly used for beaver ,look for a tag on the chain.

 

[flinthunter]

Looks too small for a 330. I'm guessing 220.

 

[bcarmack1]

 

[iowa trout]

yep 7x7 220 ,You might find a manufacture stamp on one side of the dog (the down pointing steel at 3 3/4 ")

 

[Trooper733]

Ditto on what Iowa said. If there is a mfg mark it may be stamped into the "dog" which is the notched piece at 6 o'clock position in last photo. Also check the rivets holding the wire trigger together. Late, inexpensive traps used aluminum rivets. Common mfg are Victor, Bridger, sleepy creek, and duke. Victors are the most well built and most expensive of those I listed.