$36

Vtg Gas Flow Calculator Metric Mears & Co Huddersfield,England Model 3

$10.49

Vintage Produx Original Standard Calcular Numerical Germany

$27.39

Vintage Antique Collegiate Drawing Surveying Instruments Set Cased England Made

$39

Rare Gurley 7058 Rapid Comparator Standard Version model with Case

$6.5

Vintage Pocket Conversion Factors Handbook Pamplet Size Sillcocks Miller Sales

$27.26

1944 American Chemical Society "The Chemist & The Chemical Engineer Industry NMT

$20.1

Vintage Wooden Set Squares Geometry Teaching Aids Classroom 30cm Pair

$27.05

Vintage Ebonised & Brass Rolling and Parallel Rule Combo

$20.3

Jaywess Antique Technical Drawing Compass Set with Case

$13.52

Vintage Blundell Omega 405 Slide Rule In Case (G.5)

$40.53

Antq Brass Pocket Compass c1900–1930 British Made 3.5cm Working Domed Glass (M)

$175.9

Antique Wooden Tripod for Surveying Instrument / Heliograph / Lamp stand. 154 cm