Artificial horizon embedded in a black triangular frame with - Lot 253

Lot 253
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Estimation :
150 - 200 EUR
Artificial horizon embedded in a black triangular frame with - Lot 253
Artificial horizon embedded in a black triangular frame with two circular glass windows with two containers, one of which is for mercury. In its original mahogany case. Two plaques, one on the inside and one on the outside, mentioning the inscription: "Ebstein Kalfa Marcel André Racal - Prize offered in the name of the President of the Republic". Paris circa 1900. Dimensions: 12 x 25 x 12.5 cm.
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