serial numbers for each 360 model year?

The serial number/VIN is part of the sales process and is assigned pretty early in the manufacturing process. When she hit the assembly line, she was assigned an Assembly Number and that is when she was actually built. There is a month and year on a data plate on one of the door jambs, and that tells you when she was built and corresponds to the Assembly Number pretty closely. Your OM will show you exactly where thedata plate is. 139641, VIN ZFFYT53A640139641, shows as a LHD, US 2004 MY, F1 360 Spider in Matthias Urban's book.

I have seen a listing of first and last serial numbers in a calendar year for earlier Ferraris, but not the late models. The first MY 05 360 Spider I see is 139759, so around 120 more MY 04s were built after yours, including Challenge Stradales and 360 Spiders. The first US MY 04s were around 1345xx.

 

My 04 spider is 136680

 

My '05 Spider is 139763.

 

Both of those match the data pretty well.

If anybody enjoys chasing serial numbers, Matthias Urban's book Ferrari Serial Numbers Manual and two supplements are available from his web site:

http://f-register.com/

 

My 05 spider is 139797