Vietnam era military issue combat/field wristwatch made by Benrus in December 1966; the model is MIL-W-46374.
In good working condition with all original components. The face has some scuffs (the last photo was taken at an angle using natural light to show them at their most visible; the scuffs are not as prominent when viewed face on, and they can be buffed out, if so desired, with a product like PolyWatch, which removes surface wear to acrylic crystals.
I do not have any history on this piece, as I bought it in a lot of miscellaneous items. It runs well as of this moment, and seems to keep accurate time with no lag. Everything is guaranteed original, and in the condition described. Please feel free to ask any questions you have.
Thanks for looking -