$25

Data Handling For Science And Technology by Stephan A. Rossmassler HB

$34.99

Vintage Hartford Ceramic Insulator Brown Electrical H A109 Beehive Porcelain

$80

^ Baldwin Lima Hamilton SR-4 Type N Strain Indicator #C546

$27.06

Faber-Castell No. 1-60 Basic Trig. Slide Rule, Cased

$10.83

Vintage Faber Castell Slide Rule With Case

$37.89

Lodge & Shipley 'Time' Calculator / Computer Chart - 3 1/2" Diameter- As Photo

$63.19

Black LN-T7-011-15-BK

$202.98

Antique Cartographer Technical Engineer Architect Instruments PRACISION No: 911

$87.96

Vintage Casella (London) 5ft Rule / Ruler - As Photo

$13.01

1 Piece Old Spring Scale Freiberger Precision Mechanics Hand Scale Scale

$18.94

USSR Informatics Poster – Examples of Formalized Models, 1989

$39.24

Vintage ‘Rabone’ 36 inch Folding Boxwood Ruler (No. 1167)