Full Details

Name and Model Number Dennert & Pape
Model #1
with chisel cursor
Country of Origin Germany
Date of Manufacture 1890
Front Scales A, B, C, & D scales
Back Scales S, L, & T on reverse of slide
Scale Length 25-cm
Type of Rule Slide Rule
Construction Mahogany wood with celluloid scale surfaces
Area of Use Generic
Comment Mannheim style slide rule. Dennert & Pape Altona Patent in well beneath the slide. Has two sided brass chisel cursor. Inch scale on beveled edge, cm scale on the other edge surface. May have had tables of constants on reverse.
Rarity RRR
Donor Collection of Ed Chamberlain
Match Number 118
(Click Picture for Details)

In conjunction with our 'donors' we assign a rarity rating to each item, based on the system devised by Herman van Herwijnen
(1929 - 2004), renowned Dutch collector, author, and creator of Herman's Archive, a collection of 5,000 slide rule images on CD.
• RR = Rare - 1 of 25 collectors has one; it may take a year to find an example in the marketplace.
• RRR = Very Rare - only a few known to collectors; may be several years before it comes up for sale.
• RRRR = Extremely Rare - a museum piece; unlikely that an example will come up for sale.