LONG RECORDING SOIL-AIR-THERMOGRAPH Range: SOIL TEMP. -15°C to +50°C AIR TEMP. -20°C to +40°C Supply Source. 1.5 Volts d.c. Serial No. 180772 Date: April 1977 OTA KEIKI SEISAKUSHO CO., LTD. This ones pens aren't installed as they really need replacing.
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front |
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front open |
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front side |
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rear open |