wonderful Chinese old abacus and leather wood box
ANTIQUE BRASS SCALE DOCTOR SCALE
Chinese old contrivance abacus with drawing box
Scientific Glassware from the Pressler Factory
Fossil Insect in Amber
VERY RARE 4 CYLINDER ENGINE & CLUTCH INSTRUCTION MODEL
Baby Pulse Ram Jet Engine
Pyrocon Pyrometer 0-400 degrees F
50's? Vintage Crookes Focus Effect Tube, Working
50's? Vintage Crookes High Pressure Tube, Working
General Radio 572B Microphone Hummer, Working
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keep well rare rosewood abacus with beautiful box??
Excellent beautiful abacus with rosewood box
Vintage Protractor KEUFFEL & ESSER Co NY 1276-6
Microscope Slide: Microphotograph, ???The Queen & Family"
ANTIQUE PROPPER SCIENTIFIC GLASS COVER GLOBE BOWL HUGE
Microscope Case Key and Locking Tool [LOMO] Biolam
Pair of Jetex Scorpion Engines, Never Run
50's? Vintage Crookes Deflection Tube, Working
Antique Medical STETHOSCOPE USA "Littmann"
Model Dynamo New
Glew's Scintilloscope, AKA Spinthariscope, Working
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Danger High Voltage Porcelain Enamel SIGN Vintage '50's
Vintage Brass Protractor BK Elliott Pittsburgh Germany
Microscope Accessory: Tourmaline Cap
Microscope Slides by Flatters & Garnett
VERY RARE & OLD 1 CYLINDER 4 CYCLE DEMONSTRATOR ENGINE
220MM GEMSTONE WORLD GLOBE BRONZE STAND EARTH MAP
4 NOS Gmot CO2 Engines, All the Sizes
Fancy China sculpt flower fish abacus leather box
Wonderful Silver Magnifying Glass
Ca 1912 Heinze Coil Box W/ Coils F/ Ford Model T or S
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Wonderful Silver Magnifying Glass
1908 Antique Kullmer Equatorial Star Finder - Astronomy
Tangent Galvanometer by Townson & Mercer
Fancy China sculpt flower fish abacus leather box
Ancient Soviet wooden abacus of the USSR 1925-30
Signal Brass Telegraph Key, 3/8" Contacts
NOS Pop-Pop and Mystery Boats
A Victorian pocket aneroid Barometer in Original Case
Antique Cenco Scale Cast Iron Central Scientific Co.
Electrostatic Potential Indicator
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