Full Details

Name and Model Number Richmond
Improved Milk Scale
Baird & Tatlock, London
Country of Origin England
Date of Manufacture unknown
Front Scales Temperature, Fat | Specific Gravity Lactometer Reading | Total Solids
Back Scales None (equation T=.25G+1.2F+.14 on back along with a hand created Celsius to Fahrenheit conversion chart)
Scale Length 12" (30 cm)
Type of Rule Slide Rule
Construction Boxwood
Area of Use Other
Comment For milk calculations.
Rarity RR
Donor Collection of Louis J. Gotlib, USA
Match Number 23
(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.