I've got two William Derrick "Billy" Bates bats: ('89 Brewers, '90 Reds)

a) "Billy Bates" 1990, block letter gold, cupped, R219, dark brown/natural
b) "Bates" 86-89, block letter black, dark brown/natural, but cracked at Riverfront in 1990.

The '90 will soon be on loan to a museum and I hope to verify its order date. With his short career, how many orders, quantities, models, finishes did he have?

Thank you for any help.
Brian