Bidspirit auction | Oil meter. Olive acid meter,

Oil meter. Olive acid meter, original wooden box from the period (tongue and groove wood) from the 1920s - Oil meter. Olive acid meter, original wooden box from the period (tongue and groove wood) and with a bronze plate, the original, unmodified. On it it says acid meter and the company it was from. Once we opened it, with the clasps also in bronze, we found a test tube and two glass jars that were used to test the oil, to extract the acid. It is from the 1920s, a rare, unique and difficult to find piece.