Accession No

2257

Brief Description

750mm standard scale / rule, by Negretti & Zambra, English, 1933

Origin

London; England

Maker

Negretti & Zambra

Class

weights & measures; metrology

Earliest Date

1933

Latest Date

1933

Inscription Date

5-5-1933

Material

metal (brass); wood

Dimensions

length 790mm; breadth 25mm; thickness 2mm box length 807mm; breadth 55mm; thickness 25mm

Special Collection

Provenance

Purchased from Turner and Devereux, London, 07/1976. Purchased with assistance a Grant-in-Aid administered through the Science Museum (PRISM).

Inscription

‘NEGRETTI & ZAMBRA. LONDON’ (obverse)

Description Notes

750mm standard scale / rule, by Negretti & Zambra, English, 1933.

Scale along upper edge divided 0 - 75, numbered by 1, subdivided to 0.2mm. Engraved at left hand end: ‘1/5 MILLIMETRE 750.22mm. @ 17˚C C. OF E. 0000184 PER 1˚C. SUBDIVISION ACCURACY ± .05mm. N.P.L.5/5/33.’

Condition good; complete.

References

Events