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There's a patent number on the smaller of the blades near the hinge (2037943) that led me to a US patent from 1936 but it didn't tell me a lot about this particular knife. Any information on time period, brand, model, cleaning/restoring, etc is helpful. Thanks!
Additional notes:
- I cleaned off a decent amount of rust with some soap and WD-40 but the inner workings are still pretty messy
- The yellow layer on the handles is peeling off at the ends
Update: thank you all so much for the information! I've gotten a lot of information and leads on the knife. Still nothing definite on brand but you're probably right that it's a carbon steel blade with an ivory handle from about the 1950s. I'll be tending to it properly with your information on proper cleaning and sharpening of a knife like this. I'll post another update if I find anything more definite on brand/origin. Thanks again!
My father carried either one of those or one just like it. It was given to him by his father at a young age in the 50's. Based on the other things that he had from his childhood, I expect it was a relatively affordable knife back then.