I stripped it in preparation for repainting and did not see any numbers stamped anywhere on the frame or pieces that I took off. It's for my 16 foot 1957 Arkansas Traveler boat. The trailer has a single axle with a panhard bar, shocks, coil springs, roller bunks, trailing stabilizer arms, the contoured winch assembly on the front, and beautiful round fat fenders over the wheels. I've got pics I can email if it will help. I'm guessing 1950 something?....