| Name and Model Number | Farmars Wine & Spirit Merchants Rule made by Lucas |
| Country of Origin | England |
| Date of Manufacture | C1910 - 1914 |
| Front Scales | G/H,I/J |
| Back Scales | A/B,C/D,E |
| Scale Length | Approx 28cm. |
| Type of Rule | Slide Rule |
| Construction | Ebony and German Silver |
| Area of Use | Brewing |
| Comment | This is a most unusual variant of the Farmars Wine and Spirit Rule both in size and material,
with white letters on an ebony wood body, and celluloid and ebony cursor. It is more normally found in either boxwood or with ivorene veneers on a mahogany base, and either in a much larger or smaller size. |
| Rarity | RRRR |
| Donor | Collection of Lucas at TNMOC |
| Match Number | 92 |
| Thumbnail |  |
| RR | = Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace. |
| RRR | = Very rare -- only very few known to collectors; may take several years before one comes up for sale. |
| RRRR | = Extremely rare -- a museum piece; unlikely that an example will ever come up for sale. |