Full Details

Name and Model Number Collins Milk Scale
by Brady & Martin, England
Country of Origin England
Date of Manufacture unknown
Front Scales Temperature | Gravity Gerber | Solid percent
Back Scales none
Scale Length 5" (12.5 cm)
Type of Rule Slide Chart
Construction Boxwood
Area of Use Other
Comment Milk solids calculator.
Owner knows of only this example.
Information on the company and some of their other products, most quite unrelated to slide rules
can be found at: http://collectionsonline.nmsi.ac.uk/detail.php?type=related&kv=80442&t=people)
Rarity RRR
Donor Collection of Louis J. Gotlib, USA
Match Number 22
(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.