[Als48]

Hey there, I'm like Mart, in that I think I see the faintest of numbers showing through in your photos, between the rivet and that 1/4" or so hole. Keep cleaning and I think you'll find some numbers. I went through the same process as you, swearing there was nothing there on my '48, but there it was, faint but stamped on the left rail near the radiator mount.

Al H.