It looks like a No. 3 size from the comparison with the knife. the pan looks home made or modified as it has sharp square corners, most commercial traps from today don't. Without any incused lettering on the pan, its going to be hard to tell without looking at in person, but it looks to me like an older model Victor #3 trap. The jaws aren't offset (with a gap in between) which is required in most states now. Also there are new trap dyes available that a lot of current trappers use that isn't the logwood dye and beeswax, its usually mixed with water or white gas, dipped and hung to dry and de-fumigate. but again like mentioned it would be black or dark brown in color from the trap dye, whichever kind used. I actually use this new type of trap dip now myself. Also, since there isn't a copper trap tag attached anywhere ( I roll mine up around the chain or swivel to keep from being torn off during a catch and subsequent fight) it is either leftover from a while back or again like previously mentioned, by someone who didn't know the proper or legal way to set traps. No professional or caring trapper ever sets traps directly in a trail either. Also, most professional trappers are four coiling their traps now, and like I said, using offset jawed traps for humane catches and to preserve the catch from broken bones etc. I am a licensed, nuisance trapper for the state and do some collecting of antique traps. I really think this is a Victor brand trap or copy of a Victor brand, and is definitely a modern trap. Worth about 15 bucks to a trapper who can easily replace the pan with a correct N.O.S. pan and replace the springs and weld offsets onto the jaws to make it legal to use currently. Mark