Gauge No. disk testing alignment of frame (used with straight edge)

Object Title

Gauge No. disk testing alignment of frame (used with straight edge)

Gauge No. disk testing alignment of frame (used with straight edge)

Date

05/06/1928

Reference

ENF 7/3/3 DD(E) 944

Level

item

Extent

1 drawing

Access Conditions

Open access

Reproduction Conditions

Crown Copyright