Accession No

2575

Brief Description

field plotter, Mark IV, W. Watson & Sons Ltd, English, 1940

Origin

England; London

Maker

W. Watson and Son Ltd.

Class

surveying; military;

Earliest Date

1940

Latest Date

1940

Inscription Date

1940

Material

metal (steel, brass); glass; hide (leather)

Dimensions

case length 423mm; depth 50mm; height 150mm

Special Collection

Provenance

Transferred from Institute of Astronomy, University of Cambridge, Cambridge, England, 5/6/1980.

Inscription

‘PLOTTER, FIELD MK IV
W. WATSON & SON LTD. No 9233 1940’ (signed)

Description Notes

Steel. Two semi-circles graduated on opposite sides 0-180o to 1o. Diameter of each extended and pierced with brass knurled screw clamps allowing one to slide over the other from exact co-incidence to 24 cms apart.
Diameters graduated 0-3500 by 50. Arm on each semi-circle graduated 21-65. Pierced and attached to each other by sliding clamps. Indicator arrow on window in arm reads semi-circle scale.
Leather case.
Similar to Wh: 2222.

References

Events