Some of the parts (side vent pieces) have only the last 2 digits stamped as the area was too small for more. The picture shows the '592' stamped on the door panel while '604' is chalked on the underside of the driver's seat. It's also written on the undersides of the seats, leather and fiberglass parts. The nice part about looking here is that it is easily visible when the hood is raised. The pictures shows ' 592' stamped on the latch. The Pininfarina body or build number is stamped or written on practically all of the body parts. One of the easiest places to look is on the latch part of the hood. The chassis number was stamped in the V of the most of the blocks near the front cover. The block was stamped with that same number where the chassis number was normally stamped. The serial number plate had 209/00nn instead of just 209 in the engine space. There were about 2 dozen engines around S/N 8700 that had a special stamping. The internal engine number on a 330 America is in the same place, but still used the format from the 250 GTE. The ' numero interno' is the number that Ferrari deems the engine serial number. There is also a ' numero interno' that is stamped above or near the chassis serial number that is the Ferrari internal engine number. The type 209 engine serial number (the same as the chassis number unless the engine has been replaced) is stamped on a machined surface on the right side of the engine below the RH distributor and above and just to the rear of the starter.
The stamp on the chassis should also be checked. Note, this plate is available unstamped, thus may have been replaced on cars of questionable vintage. The '209' is the motor type, not the motor serial number.
The two locations are on the right hand side of the hood catch and near or on the sheet metal covering the right front shock. This serial number is also replicated on a plate which is pop-riveted onto the body in the engine compartment. On very late 330 GTs, Ferrari started stamping the chassis number on right side of the front member. The Certificate for the 330 GT, issued Decemis number 3835 OM, thus IGM 3835 OM. C., which I presume is an Italian government bureau dealing with motor cars. IGM is for Ispettorato Generale Motorizzazione Civilie e T. The IGM 3835 OM stamping was always a mystery to me until I downloaded the homologation form (from the Ferrari Owner's site) for the 330 GT. The actual chassis serial number is the *8755* partially covered by the heat shield. This is stamped into the front member near the mechanical fuel pump. The main one is the Ferrari chassis serial number.
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