$750

Early Electirc Bipolar Motor Educational Scientific Dynamo

$19.99

TRUMBULL Electric Co Copper Double Knife Switch on Porcelain Base Frankenstein

$139

Antique Milvay DC Voltmeter Wood Chicago Apparatus Scientific Untested Decor

$47.12

(Aircraft Instrument) Negretti & Zambra Aviation - Vintage PSI Gauge

$45

Human Benign Cystic Teratoma Ovary Pathology Microscope Slide

$15

Saprolegnia sexual cycle Microscope Slide

$45

Roller Smith Direct Current Ammeter Meter USA Untested Steampunk Style

$40.4

Job Lot of 3 Scientific Glass Levellings. P/N: 71BB 545. Ex MOD

$212.78

Antique Brass Theodolite Surveying Instrument c1900 Transit Compass

$25

Vintage Roller-Smith Co Electrical 0-250 Type TD D.C. Amperes **Untested

$749

Antique 1800's W & L. E. Gurley Compact Railroad Surveyor's Compass w/ Wood Case

$12.95

Vintage Eveready Amp Meter