| Manufacturer: |
IWA |
| Country of Manufacture: |
Germany |
| Type: |
1638 System Wern |
| Number: |
|
| Date of Manufacture: |
|
| Scales: (Front) |
D, A, B, C, U, V, M, N, T, S, r, p, a, b, c, LL |
| Scales: (Back) |
None |
| Number of Scales: |
16 |
| Gauge Points: |
π, p, P, v, q, r2, r3, V, N, gF, S, gE, R, p', p" |
| Slide Rule made from: |
Plastic |
| Cursor made from: |
Plastic |
| Cursor Lines: |
1 |
| Overall Length of Rule: |
19.5 cm Diameter |
| Length of Scales: |
|
| Width: |
|
| Depth: |
0.1 cm |
| Weight: |
|
| Acquired from: |
Stuart Hawkinson |
| Date: |
Jan 2004 |
| Condition: |
Good |
| Accessories: |
Plastic sheath.
Instructions (includes English). Good condition
|
| Comments: |
Very unusual single rotating
circle on a square base.
|