Proposed Proof Apparatus, Discharger, Signal, 1.5 inch

Object Title

Proposed Proof Apparatus, Discharger, Signal, 1.5 inch

Proposed Proof Apparatus, Discharger, Signal, 1.5 inch

Date

30/11/1940

Reference

ENF 7/3/3 DD(E) 2680

Level

Item

Extent

1 drawing

Access Conditions

Open access

Reproduction Conditions

Crown Copyright