It could be interesting to establish how long did special 1964 features continue to appear on 1965 built cars:

Vin: 300492 (delivered new on 9 March 1965):

- still has 6 vertical folds on front seats
- still has early exchangers
- still has early lower dash
- still has 4 screws on front vents
- still has leather gear change base
- has the 911 script on the lid but NOT on the glove box
- no longer has fuel door release inside the door pilar
- no longer has the flat engine bay lid
- no longer has the longer engine hood

Vin: 301666 (sold on 12/7/1965 in California, so I presume 7 december 1965):

- no longer has 6 vertical folds
- heat exchangers were replaced in 1984, not sure what type was originally mounted
- still has early lower dash
- still has 4 screws
- still has leather gear
- has BOTH the 911 script on the lid and on the glove box

What happened in between?

Establishing by Vin numbers when early features were dropped would be helpful (it would help me know if early exchangers were originally on 492 )