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编号 84111589
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放大镜 - Dome Magnifier - 1900-1910 - 德国 - 17 Visolett dome magnifiers
Lot of 17 Visolett dome magnifiers made of bakelite ( 2 ) & glass, Germany ca.1900.
The upper convex surface and lens thickness provide the optical power for magnification and the domed convex surface refracts light from all directions onto the surface being magnified. It was invented by Georg Jaekel of Berlin-Zehlendorf, Germany.
Dimensions: height - 1.5 cm, diameter - 2.7 cm for 15 magnifiers and 2 x 1.8 x 3.5 cm
2 magnifiers are marked `Visolett glas D.R.P.A. S.O.G. REG. TRADE MARK`
All 17 are in near mint condition!
Take a closer look at the images for more details.
编号 84111589
已不存在
放大镜 - Dome Magnifier - 1900-1910 - 德国 - 17 Visolett dome magnifiers
Lot of 17 Visolett dome magnifiers made of bakelite ( 2 ) & glass, Germany ca.1900.
The upper convex surface and lens thickness provide the optical power for magnification and the domed convex surface refracts light from all directions onto the surface being magnified. It was invented by Georg Jaekel of Berlin-Zehlendorf, Germany.
Dimensions: height - 1.5 cm, diameter - 2.7 cm for 15 magnifiers and 2 x 1.8 x 3.5 cm
2 magnifiers are marked `Visolett glas D.R.P.A. S.O.G. REG. TRADE MARK`
All 17 are in near mint condition!
Take a closer look at the images for more details.
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