| Name and Model Number | Fuller Calculator s/n 633 Early 1880s Stanley |
| Country of Origin | England |
| Date of Manufacture | c. 1880 -1885 |
| Front Scales | Spiral C scale |
| Back Scales | None |
| Scale Length | 12.7-m |
| Type of Rule | Cylinder |
| Construction | Spiral scale on paper glued to a hardboard cylinder. The scale tube slides on a wooden cylinder affixed to a wooden handle. Two long brass index pointers facilitate calculations. |
| Area of Use | Generic |
| Comment | The Fuller Calculator is not rare, but this is a rare example of the Fuller in its first years. Serial number 633 was issued before 1885, within 5 years of when production began and at least 10 years before K&E listed the Fuller in its catalogs. I purchased this Fuller in England. |
| Rarity | RRR |
| Donor | Collection of Ed Chamberlain |
| Match Number | 156 |
| 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. |