| 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 |
| Thumbnail (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. |