This a very interesting watch. It is a 1970 Sea King that has a modified dial with the hour markers replaced with (19)71 Kansas Relays. It has a N0 date code on both the 17J 11BLC movement and case back. I believe the was a Bulova factory modification and was presented to winners of the events. The 1971 Kansas Relays had the distinction of Bruce Jenner winning the gold medal in the decathlon. Not sure who won it but glad to have it.
1970 Sea King (Custom Dial Variant)