$4.61

1961 POPULAR SCIENCE MAY 5TH WHEEL RUNS NEW BUS STOPS IT TOO BLUEPRINT YARD T

$254.25

Rare THALES Mechanical Calculator - VERY GOOD CONDITION

$24.3

Vintage Drawing Surveying Instruments x 5

$33.76

VERY RARE Vintage (c) Unique S062 "UNIVERSAL II" Engineering Slide Rule!

$19.5

VINTAGE TARSPRAYING INDICATOR INDUSTRIAL CALCULATOR G. POLGLAZE

$39.99

RARE Vintage tool Medical instrument tweezers Aesculap Dissecting Ussr Soviet

$87.76

THE ENGINEERING MAGAZINE AN INDUSTRIAL REVIEW 1897-1915 19 Volumes Not a run

$40.49

Draughtsman Drawing Set by Schoenner Germany

$60.08

VINTAGE DRAUGHTSMAN'S ROLLING RULE RULER IN WOODEN CASE - W H HARLING LTD

$25

Vintage Sylvania Lighting Slide Rule, GE Fluorescent Lighting Calculator

$149

ANTIQUE SWISS METAL MECHANICAL SLIDE CHAIN ADDING MACHINE CALCULATOR ADDER STIMA

$49.28

Authentic 'Stacked Battery' Box Weighing Bronze 19th Century 1 Pound 500 Grams