| Manufacturer: |
Dietzgen (Gilson) |
| Country of Manufacture: |
U.S.A. |
| Type: |
Binary Circular |
| Number: |
|
| Date of Manufacture: |
1940+ |
| Scales: (Front) |
C, CI, A, K, L, 4 rev LL, Binary, Fractions,Drill size and mm conversion |
| Scales: (Back) |
( Degrees, Sine, Tangent ) * 3, Fractions-Decimal Equivalents |
| Number of Scales: |
21 |
| Gauge Points: |
π, q |
| Slide Rule made from: |
Aluminium |
| Cursor made from: |
Plastic. Two on front, 1 on back |
| Cursor Lines: |
1 on each cursor |
| Overall Length of Rule: |
Diameter 21 cm |
| Length of Scales: |
|
| Width: |
|
| Depth: |
0.2 cm |
| Weight: |
135 gm |
| Acquired from: |
Peter O'Brien |
| Date: |
Sept 2000 |
| Condition: |
Good |
| Accessories: |
Plastic case. Good condition
Instructions (English). Good condition
|
| Comments: |
Re-badged Gilson Binary Circular Type 2
Two major articles on Gilson Circular Rules,
JOS Vol 9 No 1, JOS Vol 9 No 2
|