Richardson Pantocrat Dual Slide

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Country of manufacture: USA,            Date of manufacture: ____
Overall length: 27.7 cm,          Width: 4.3 cm,           Weight: 144.0 gms (body & both slides)
Materials: stainless steel body, stainless steel slides with celluloid facing.
Cursor: none on this specimen
Scales: no extensions
Front: K, SIN, A [ see below ] D, TAN, LOG
Back: Instructions for Use
Slide 1 (1776): Problem Keys [ B, CI, C ] Problem Keys
Slide 2 (1860 LL): C, LL¹, LL², LL³
Gauge Marks: [ π, C, e, 785, c (2154), c² (4642) ]
Condition: C4 (signs of minimal use)
Came with: Original cardboard box/case

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Slide 1 (1776):

Slide 2 (1860 LL):

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