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Radio transmitting set for radiosonde

1973

Accu-Lok radiosonde. For NOAA - National Service, US Dept. of Commerce.

Accu-Lok radiosonde. For NOAA - National Service, US Dept. of Commerce.

Radio transmitting set for radiosonde

1974

Accu-Lok radiosonde. For NOAA - National Service, US Dept. of Commerce.

Early radiosonde, in balsa wood case, unsigned, 1930-1939

Early radiosonde

1930-1939
Spare battery in sealed pack, unsigned, for Vaisala RS21 radiosonde, serial no 624957-8, for 400 MH3 Meteorological frequency band, in two components, by Vaisala Oy, Helsinki, Etelä-Suomen Lääni, Finland, 1971

Spare battery in sealed pack