It may not look like it,but the two rims are identical, aside from the hole for the snare wires obviously.It does have a serial number, which is how I could date it to 1969. If crimped snare beds are what i think they are, then these ones are not crimped. I have two scales that are not very precise, one says 7 pounds, one says 8. Everything points to this being a Ludalloy snare, as far as the date and everything, but I was confused because people say to scratch and look under the finish when in doubt, and this looks like brass (or maybe copper) under the finish where it has flaked inside.