What do the numbers on the side of a 904 transmission mean?

PK = Plant, Kokomo, IN. 4471534 is the assembly number. I don't see that exact one in Paul Herd's new book on Torqueflites, but 4471535 is a 1988 999 lockup trans from a 318 with a 2.94 axle. 9695 is the date, based on the 10,000 day calendar, decodes to Feb. 12 1988. 5953rd transmission assembled that day.