[Technical diagram] / Air Technical Services
- Made:
- 1918
[Technical diagram] / Air Technical Services. 1918 Apr. [Colour litho.] O.T.5. 1095B: Elliott revolution indicator. Principle of working. [See also inv. nos. 1994-1444/1 Pt1 (MSP 124/1/1) & 1994-1442/1 (MSP 125/1)]