Seiko numbers on back
Hi all,
I just bought a Seiko 7N36-6A49 diver and photos show it is in very good cosmetic condition. I'll know about functional condition when it arrives. And I have a question about sequential numbers, stamped in an arc on the back, that start at 09 and stop at 18 (see pic). What is their purpose? Do they help knowing the year the watch was made?
thanks,
henrylr