Helix No.A101 (10-inch) slide rule
- Made:
- 1965-1975
Helix No.A101 (10-inch) slide rule with plastic case
Details
- Category:
- Mathematics
- Object Number:
- 1998-449
- Measurements:
-
overall: 10 x 320 x 50 mm
- type:
- slide rule
- credit:
- Mr J.C. Michie