Accession No

2551

Brief Description

miner’s dial, by Davis and Son, English, 1900 (c)

Origin

England; London and Derby

Maker

Davis and Son

Class

surveying

Earliest Date

1900

Latest Date

1900

Inscription Date

Material

metal; brass; steel; white metal; oxidised brass; glass; wood; cloth; felt

Dimensions

overall height 270mm; overall length 360mm; compass diameter 140mm

Special Collection

Provenance

Purchased from Sotheby’s Belgravia, London, England; lot 161, 09/05/1980.

Inscription

‘Davis & Son,
London & Derby.
No. 292’ (compass face)

Description Notes

Compass ring in brass mount. Silvered 8-point rose graduated [0] - [90] - [0] - [90] - [0], numbered by 10; raised degree scale divided [0] - 360˚, numbered by 10˚, graduated to 1˚. Blued steel needle with locking bar. Two brass bubble levels set orthogonally into the base. Glass plate over all. Brass cover. Brass rocking circle carries slit and window sights or telescopic sights mounted in Y bearings. Clamp and tangent screw for horizontal circle. Vertical angle recorded by needle revolving over a glazed dial gradated 0 - 45 - 0 and 0 - 30 - 0. Telescopic sight with black finish; rack and pinion focus (broken); cross hairs; bubble level mounted over telescope.
Four levelling screws below domed plate. Screw socket for attachment to tripod. Fitted wooden box.

Condition good; complete

References

Events