Being focused upon WWI and WWII, I have not paid close enough attention to the timepices of Viet Nam to present.

There are some rather interesting timepieces to be found from this era. And a large following of collectors seeking them out.

E C Frederick has provided an invaluable resource for those who collect military wristwatches from 1964 to present. Be sure to check this out:

MIL-W-46374 Spec.

Best regards,
Greg