NP 203 ID question

[72 Cheyenne K20]

I crawled under the truck today to see if I could get ID info on the transfer case. I know it’s a 203 but it doesn’t have a tag attached to it, but it does have a stamp that reads where the tag should be.

K 6 B02

Maybe they used a stamp instead of a tag? Anyone ever seen this way of dating a transfer case.

I’m assuming the 6 is for 1976 and B02 is for Feb 2. It would fit, my truck was built Feb of 76.

Thanks Scott