Accession No

3059

Brief Description

exposure reckoner, by the Imperial Dry Plate Company, English, 1/4 20th Century

Origin

England; London; Cricklewood

Maker

Imperial Dry Plate Company Ltd.

Class

calculating

Earliest Date

1900

Latest Date

1925

Inscription Date

Material

paper (card and one other); hide (leather)

Dimensions

length 123mm; breadth 76mm; height 10mm

Special Collection

Steward collection

Provenance

Collection purchased from member of the Steward family, 1974.

Inscription

‘THE
IMPERIAL
EXPOSURE
RECKONER.
Gives
Correct
Exposures under
all conditions
without any
Calculations.
THE IMPERIAL DRY PLATE CO., LTD., CRICKLEWOOD’ (envelope)
‘Imperial
Exposure
Reckoner
1/-
The Imperial Dry Plate Co. Ltd.
Cricklewood-London. N.W.’ (front cover)

Description Notes

Leather-covered ‘booklet’ containing table of light values throughout the year and slide rule for calculating exposures. Slide rule has double slide, one for weather conditions and speed values, the other for subject and stop. Stock carries scales for light value and exposure time. Instruction leaflet also. Back of booklet carries details of appropriate plates for different usages.
Battered brown envelope.

Condition good (envelope fair); complete.

References

Events