Its a 3713 four blade. Dont know what a 71 pattern but it looks to be a serpentine cattleman. It has a strange main blade, at first I thought it was a worn down clip but with closer look it may be a wharncliff or sheepsfoot.
Notice the outline of the profile in pics. The primary end tang stamps are circle umc without made in usa the secondary are with made in usa. So very possibly made in 24-25 time space. The bone stag is weird, it jigged in front and plain old shin bone on back. You can see the nick out of the back handle, shows it to be bone. I tried to get a pic. of inside of liner. There is a cutout on one side. Its like a halfmoon. I cant find one of these to compare too. Any ideas as to authenticity,age,worth etc. Walks and talks like new. Big beefy backsprings.
wb







