JAPAN (1969) Atom*. Ship*. Nuclear ship Mutsu, overprinted MIHON (specimen). Scott No 991, Yvert No 943. Not easy to find!
AVAILABLE AT $30
JAPAN (1965) Atomic Power Stations*. I.A.E.A. issue overprinted MIHON (specimen). Scott No 848, Yvert No 810.
AVAILABLE AT $20
JAPAN (1966) Cobalt treatment unit*. Overprinted MIHON (specimen). Scott No B32, Yvert No 854.
AVAILABLE AT $15
JAPAN (1977) Reactor core*. Fast Breeder Reactor, overprinted MIHON (specimen). Scott No 1303, Yvert No 1222.
AVAILABLE AT $25
JAPAN (1994) Monju breeder reactor*. Overprinted MIHON (specimen). Scott No 2242.
AVAILABLE AT $20