Carter List

4640 C-4-AVS 69 440 A-134 A/T & A/C

can anybody tell me what the "A-134" means?

i have a 4640SA that's got the prefix B3 and gold triangle tag that reads:

4640SA
0433
92 (this is in larger size and on the lower left)

i'm guessing the B3 is year? as for the rest i'd love to know.