Accession No

3019

Brief Description

two Maxim fire directors for Vickers gun and Mark III S.A.A., by J. H. Steward Ltd., English, 1/2 20th Century

Origin

England; London; 406 Strand

Maker

J. H. Steward Ltd.

Class

mathematics; military

Earliest Date

1900

Latest Date

1950

Inscription Date

Material

plastic (celluloid)

Dimensions

3019.1 length 142mm; width 114mm; 3019.2 length 140mm; width 115mm

Special Collection

Steward collection

Provenance

Collection purchased from member of the Steward family, 1974.

Inscription

‘THE “MAXIM” FIRE DIRECTOR FOR VICKERS GUN & MARK VII S.A.A.
(J.H. STEWARD LTD STRAND, LONDON)’ (3019.1)
‘THE “MAXIM” FIRE DIRECTION PROTRACTOR
(J.H. STEWARD LTD 406, STRAND, LONDON) FOR VICKERS GUN & MARK VII S.A.A.’ (3019.2)

Description Notes

2 almost identical rectangular celluloid protractors. Obverse: degree scale around 3 edges divided [0] - [180] and [180] - [360] numbered by 10 subdivided to 1. Scale of inches along 4th side divided [0] - 4 numbered by 1, 1st inch subdivided to 1/8. Centre contains range tables.
Reverse: Chart for calculating height of trajectory for different ranges. Also a scale of centimetres along one edge divided 0 - 10 numbered by 1, 1st cm subdivided to 0.1. Conversion factor given between metres and feet.

Condition good; complete

References

Events