Full Details

Name and Model Number Nestler 330 Chemiker
Country of Origin Germany
Date of Manufacture 1970s
Front Scales Sought | Found C | D
Back Scales | Found C |
Scale Length 25 cm
Type of Rule Slide Rule
Construction Plastic
Area of Use Chemical
Comment Back of slide has a different set of elements and compounds.
Rarity RR
Donor Collection of Louis J. Gotlib, USA
Match Number 24
(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.