Looks like a somewhat modern Hamilton... maybe a Khaki Pioneer? Although I'm surprised that it's printed on the dial.
What's on the back and/or in the packaging?
In any event, it looks like a nice pickup.
Case back has 9715 Hamilton Watch Co. Lancaster Pa, water resistant stainless steel. Booklet has a reference to changing the battery and has Sept 89.
Strap looks to be orignal with Hamilton USA on it backside.
So, I guess it is from 1988 or so and must have been an early Khaki model.
I've also not tried to lift the caseback yet. Not sure if it screw down or snap. Not visible notch for prying.