[Mart]

Ditto above.

No factory crossmembers were bolted in. Early non reinforced frames did suffer bending and cracking. (I know, I have one).

So the rear crossmember has been removed and replaced, as has the front (or the original put back in)

Is the k-member still rivetted in? Did any frames make it into proper production without k-member legs?

There should be a serial number stamped in the left frame rail. What does it say? It may be repeated in two other pleces along the frame.

Everyone likes to believe they have some super early or super rare part. In reality the chances of that bare extremely slim. It's more likely to be something that has been patched up by a succession of previous owners.

The serial number will reveal all.

Oh yeah, it does have reveals in the side rails, doesn't it? I remember a thread on here that ran and ran without the serial number ever being revealed or pictured by the owner.

Mart.