Modern Vespa

I have a 77 p200e that seems to be missing the serial number on the engine. The square where the number would normally be at is blank. Is it possible that this was a replacement engine or case?

thanks

Hi, on my 1981 P200E the engine S/N is stamped on a parallel "window" on the swing arm below the cylinder so it's strange there is no S/N there in your's. To be a replacement part is hard to believe as it's the main part of the engine and I believe expensive. Does it look like it is sanded by someone to remove completely the original S/N;
Here's a picture of mine:

https://www.scooterhelp.com/serial/vespa.serial.locator.html

That square is blank on mine and it does not look like its been sanded nor ground down. It has slight pitting (like from casting) like the rest of the swingarm. It was rather dirty so I sprayed kerosene and brushed it with a nylon brush to see whether any numbers were below the caked grease but nothing showed. If sanded or grinded on I assume it would have shown tooling marks.

Maybe a picture of the whole engine?

Replacement cases I believe did not come with numbers. I think you were supposed to re-stamp with the number from the damaged case.

That's correct, replacement swingarms would come with no S/N but I believe they should have at least the Piaggio hexagon badge like every genuine Piaggio spare part, and maybe only the letters "VSE1M"

A replacement frame for example has the following letters:

DGM OM
(hexagon badge) VSX1T

on a factory frame there's a number between DGM and OM which is the frame model (like 16773 for a P200E) and another third line below with the S/N between two stars:
*######*

So I think this is a factory swingarm that someone grounded the whole letters/numbers and not a replacement one, at least that's what I suppose...

This has come up on here before, replacement cases come without serial numbers if I remember correctly.

Doesn't look like that case has been molested to remove the number at all.