JAPAN (1950) Microphone*. 25th anniversary of radio broadcasting issue, overprinted MIHON (specimen). Scott No 499, Yvert No 445.
AVAILABLE AT $25
JAPAN (1975) "Seeing & Hearing"*. Japan Broadcasting 50th anniversary issue with MIHON (specimen) overprint. Scott No 1207, Yvert No 1148.
AVAILABLE AT $15
JAPAN (1977) Early loudspeaker*. Telegraph key*. Amateur radio issue overprinted MIHON (specimen). Scott No 1312, Yvert No 1238.
AVAILABLE AT $15
GERMANY (1982) Color TV Camera*. Specimen (overprinted MUSTER). Scott No 1180, Yvert No 966,
AVAILABLE AT $15
GERMANY (1983) Nipkow's Phototelegraphy diagram*. Specimen (overprinted MUSTER). Scott No 9N487, Yvert No 662.
AVAILABLE AT $15
JAPAN (1985) Radio tower*. Adult education through broadcasting issue, overprinted MIHON (specimen). Scott No 1642, Yvert No 1525.
AVAILABLE AT $15
JAPAN (1985) Cherry blossoms*. Radio Japan se-tenant pair overprinted MIHON (specimen). Scott Nos 1649-50, Yvert Nos 1536-7.
AVAILABLE AT $25