(Image b)
U.S.A. (1896) Battery tester. Electrical equipment. Entire (O) with corner illustration of some kind of battery tester with gauge running from -250 to +250 and labelled "Chloride Silver Battery Co. Patented July 30, 1889." Reverse has illustration of a cabinet containing various electrical components.
AVAILABLE AT $100
UNITED NATIONS (1970) Power lines. Mekong river. Map of delta. Set of 10 imperforate progressive proof pairs. Scott No 205, Yvert No 199. Lower Mekong River Development. From the UN printer archives. Rare!
AVAILABLE AT $100
UNITED NATIONS (1970) Power lines. Mekong river. Map of delta. Set of 10 imperforate progressive proof pairs. Scott No 206, Yvert No 200. Lower Mekong River Development. From the UN printer archives. Rare!
AVAILABLE AT $100
FRANCE (1972) Berges. Trees. Deluxe sheet. Aristide BERGES is considered the inventor of hydroelectric power. Scott No B454, Yvert No 1706.
AVAILABLE AT $20
GABON (1973) Kinguélé Dam & Hydroelectric Station. Deluxe sheet of triptych. Scott No C140a, Yvert No PA140a.
AVAILABLE AT $40
CONGO (1975) Ampere. Electrical apparatus. Deluxe sheet. Scott No 358, Yvert No 406.
AVAILABLE AT $20
U.S.A. (1985) Rural electrification. Misperforation resulting in bottom of stamp appearing at top. Scott No 2144.
AVAILABLE AT $40
FRANCE (1966) Tidal power station-Rance. Deluxe sheet. Scott No 1170, Yvert No 1507.
U.S.A. (1971) Yashica camera. Red meter cancelation on piece, PB #617619: "Yashica - Pioneer in Electronic Photography - Electro 35."
AFARS & ISSAS (1977) Edison. Phonograph. Die proof in black signed by the engraver GUILLAUME. Scott No C104, Yvert No PA110.
