Re: Help decoding strange VIN???
The Omologation Certificate applicable to the 348 Spider is the #DGM 405 year 1989, revised 1993 (it includes GTB and GTS data).[/quote]
Just to be more precise, DGM #405 is the general Omologation data sheet.
The specific one for 348 models is DGM 52837 OM (first issue Sept 09 1989).
The ones for 348 GTB, GTS and Spider are, respectively:
OM 52837 EST 04 del 01/07/93
OM 52837 EST 05 del 01/07/93
OM 52837 EST 06 del 01/07/93
Omologation sheets can be downloaded from the Ferrari Owner's official site.