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History of Science Museum

Two-Aperture Diaphragm Camera Accessory

Inventory Number 90425


Item type
Object
Provenance
Pres. by Mr. & Mrs. Lockwood
Physical material
Metal
Paint
Glass
Dimensions
Diameter: 60mm Height: 30mm Weight: 44g
Inventory No
90425
Accession Number
1981-8/62

Description

A metal disc with a glass lens on either side. Along the side of the disc is switch. There are three holes in the disc.