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

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

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

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

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

Radio transmitting set for radiosonde

1974
Radio transmitting set for radiosonde

Radio transmitting set for radiosonde

1973
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