Antique Wood & Glass Welch Science Tester
No idea what it is but very old.
instruments
microscope
sons
leitz
original
rare
cased
compass
barometer
thermometer
vintage
pocket
case
antique
working
stick
model
london
watson
19th
circa
victorian
brass
large
instrument
wetzlar
mahogany
monocular
telescope
scientific
early
machine
wooden
drawing
century
Antique Scientific Instruments
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