Tom Cruise wears an unidentified watch

Tom Cruise plays Ron Kovic in Born on the Fourth of July (1989), seen here as a young Marine returning fire in the Vietnam combat sequence. There's a watch on his wrist on a dark strap, but the murky, fire-lit frame and the motion of the firefight keep the case and dial from resolving. It's most likely a plain period field watch, though the image won't confirm a maker. If you can place what Kovic's wearing, or want to guess, say so in the comments.