A military organisation would have the brass
and would probably have the machinery to make the blanks, but they would probably not have the machinery to make dies or the coin presses. IIRC, there was no mint in Saigon at the time. They may possibly have been made in Japan or Korea.
Peter
The military type tokens,
along with the slot machines, were made by Sega Games Co., Ltd.
SEGA originally short for Service Games and officially styled as SEGA, is a Japanese multinational video game developer and publisher headquartered in Tokyo, Japan.
See more
here