Possible Bulova Jet Clipper from 1969
All stainless steel case and caseback, dated M9. Approx 31mm diameter N/I crown. Black dial with silver and luminous hands and markers (may be original, as the case showed years of grime before being cleaned). Has an 11BLAC 17-Jewel automatic movement dated M8. Crystal removed for photos.
Closest ad I could find is a 1966 Jet Clipper that comments on a black dial; not sure if this same named model was still being made in 1969, or using another name.