From Patrimoine Scientifique et Technique De L’Universite De Strasbourg. Described as made by the Pixxi family in Paris who were manufacturers of scientific instruments. Stated to be manufactured before 1850.
From Patrimoine Scientifique et Technique De L’Universite De Strasbourg. Described as made by the Pixxi family in Paris who were manufacturers of scientific instruments. Stated to be manufactured before 1850.