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Ships within 48 hours · Estimated delivery Aug 25 - Aug 30
Reserve from the case
Ships within 48 hours · Estimated delivery Aug 25 - Aug 30
Diameter: approximately 25 cm
all the pencils are present
En bon état général
The plate is curved because it had to be fixed on a slightly rounded support
There are a few barely visible micro scratches on the bottom of the plates
Ancienne régle à calculs d'extrait sec des laits Tavernier-Gravet modèle Jean Pien Fourchettes à fondue Diameter: approximately 25 cmOld ruler for calculating the dry extract of Tavernier Gravet milk, Jean Pien model. This model used in agriculture makes it possible to instantly obtain the total dry extract and the defatted dry extract of whole or skimmed milk. This very unusual slide rule model dates from after 1943. The ruler is in very good condition and its cardboard box is present. There are some small signs of yellowing on the plastic. The original instructions are missing. I
US$ 22.90
US$ 10.90
US$ 14.90
US$ 29.90
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