Full Details

Name and Model Number Dennert & Pape
12.5-cm Pocket Slide Rule
with chisel cursor
Country of Origin Germany
Date of Manufacture c. 1896
Front Scales A, B, C, & D scales
Back Scales NONE
Scale Length 12.5-cm
Type of Rule Slide Rule
Construction Boxwood mounted on thin celluloid back with front celluloid scale surface.
Area of Use Generic
Comment Early D&P pocket Mannheim slide rule. Celluloid back holds stators; "D&P" and D.R.P. No. 126499 engraved in well beneath slide. Has brass chisel cursor.
Rarity RRRR
Donor Collection of Ed Chamberlain
Match Number 117
(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.