Anyone happen to know what it 'should' be?

 

It depends on the individual amp ratings, depending on application. There was a 37 amp for the standard non A/C car, 55 amp for an A/C car and I believe 63 amp for an electric rear defrost car. In 71, 442s still had the open face design. I have pictures from my non A/C car, which are attached. From the 71 Assembly manual, the 37 amp is code DE, part number 1100934, the 55 amp is code SV part number 1100522, and the 63 amper is code DS part number 1100592. These are all 442 codes, with W30 being included. The 442s had the internal regulators, while the Cutlasses did not and had the voltage regulator on the firewall. Hope this helps.

 

Thanks for clearing that up, Im looking for the 37, I have happened across a 55 but that is not correct, how is date code read?

 

0H12 means:
0 - 1970 - calendar year
H - August - month of year
12 - day of month.

My 71 was an early build, therefore most of the parts are from August of 70.

 

excellent
Thank you!

 

To elaborate on Rocketbrian`s response, the 1100934 is correct for the 37 amp application but the other numbers for 55 amp and 63 amp are Second production numbers. The original part number for the 442 55 amp is 1100935 and for the 63 amp it is 1100949. Also I think a Typo from OP. the 2nd production number for 55 amp is 1100552. Hope this helps.