Full Details

Name and Model Number Fuller's TimeTelegraph /
Palmer's Computing Scale
Country of Origin USA
Date of Manufacture 1851
Front Scales Palmer's Computing Scale: [ C ] D
Back Scales Fuller's Time Telegraph: [ Days Months ] Days/Weeks Days (365 to 1) Days (1 - 365)
Scale Length 26.5” (67 cm)
Type of Rule Disc
Construction Cardboard
Area of Use Other
Comment Basic mathematics (Palmer's Computing Scale) and calculation of time in days and weeks between two dates (Fuller’s Time Telegraph).
Issue 6 - Portfolio included with 23 page instructions attached to front cover and fold out table of mechanical movements attached
to back cover. Instrument fits in the portfolio.
Rarity RR
Donor Collection of Dr. Paul J. Tarantolo Jr.
Match Number 28
(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.