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When looking for information on a Dino the first stop should always be Dino Register
The Dino Register

To aid in that research I think it might help to post some photos of the special numbers on a Dino, what they look like, and where to find them. I thought I'd take a first shot at it and hope others would add to this thread.

The Chassis number is the most direct to be found. It is on the edge of the driver's side engine compartment (bottom center in first pic) with leading and trailing stars. On one of my 1973 246 GTS Dinos, it states this:

DGM
Dino 246 GTS *05702*

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To find the engine type stamping and engine number stamping, it gets a bit harder. They are located on the passenger's side of the engine block's top facing surface and are packed in among hoses, wires, and the oil filter. The Engine type stamping is located on the back ledge above the water pump while the engine number is on the same ledge but forward about 6 inches.

To gain good visibility I found that the passenger's side wheel and inner splash panel must be removed along with the oil filter, wires and hoses. You may have good results if you don't remove anything and just shove a digital camera in and start taking photos.

First, here is the engine type stamping.

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Here is the engine number.
On the same ledge as the type number, but forward about 6 inches and just above the water pump. There are stars that lead and trail the number. VIN 05702 has engine number *0010999*.

NOTE:
Engines were built at Ferrari, bodies designed by PininFarina were manufactured at Scaglietti in a separate process so they proceeded independently. The VIN number was assigned only when they were mated, hence the Engine number and body serial numbers are not the same as the VIN number.

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The transaxle number is located on the underside of the Dino, at the passenger's side rear most corner tab of the transaxle.

I believe 2063 E indicates it was the E series 246 GTS.

These Chassis, VIN, Engine, and Transaxle numbers were submitted and confirmed by the factory as 05702 received its Heritage Certificate. Sadly this free service is no longer available as it was replaced by the Classiche service.

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The Dino body was designed by PininFarina but fabricated by Carrozzeria Scaglietti.

Since the bodies were produced at a different facility than the Ferrari factory then it makes sense that they would have their own number to track them during fabrication by Scaglietti. As with many Italian cars of the time, these may/may not be actual sequence numbers.
Also, I'm betting the VIN/Chassis number was only assigned after the body was mated to an engine/transaxle. That would make these body numbers essential in controlling each Dino body during manufacture and keeping a good count of them.

Here I've found body number 2024 on both of the rear trunk hinges and on the driver's side coolant expansion tank mounting tab of Dino # *05702*. The coolant tank must be removed to see these.
Perhaps the "S" in the S503 number refers to Scaglietti?

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Both fore and aft door jamb kick panels are marked 2024 which match the other body numbers. These were hand built cars and this is how Scaglietti kept track of the parts which go together

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More trim pieces that have the same Scaglietti body numbers.

On the leading edge of both doors is a chrome trim surrond piece that has 2024 stamped in them.

[Jimmy Chen Shiba DDS]

Here's my contribution with the number. Thanx for starting this, SCM246 !!! w/ smiles Jimmy

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Engine bonnet lid had a grease pencil marking of the Scaglietti body number 2024, only revealed after stripping by media blasting

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Rear tunk lid stripped with Scaglietti body number 2024

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The Driver's door has the Scaglietti body number 2024 on the inside face opposite the door jamb at the top hinge.

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The Passenger's door has the Scaglietti body number 2024 on the inside face opposite the door jamb top hinge.

[tazandjan]

Great stuff. I had a Dino (02984) and the only numbers of which I was aware were the serial number embossed on the steering wheel boss and on the chassis member in the engine compartment.

Did Euro cars have the steering column embossed with the serial number?

Taz
Terry Phillips

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Originally Posted by tazandjan

Great stuff. I had a Dino (02984) and the only numbers of which I was aware were the serial number embossed on the steering wheel boss and on the chassis member in the engine compartment.

Did Euro cars have the steering column embossed with the serial number?

Taz
Terry Phillips

Great question. Only USA Dino's had numbers on the steering column or the driver's door jamb rear facia.

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The top of the steering column marking was only found on USA cars

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The driver's door jamb, rear facia had this marking plate and was only found on USA cars

[tazandjan]

SCM- Thanks, as suspected. My December 15, 1970 Daytona did not have the steering wheel boss serial number, either, even though it was built mixed with early US spec Daytonas.