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3 1/2"plain ring gauges by Sir W.G. Armstrong Whitworth and Co. Ltd.

1904

4 1/2" ring gauge by Sir W.G. Armstrong Whitworth and Co. Ltd.

1904
A ring gauge used to locate 'Zero Point' to suit the marking system.

A ring gauge used to locate 'Zero Point' to suit the marking system

1892
3 1/2" and 4 1/2" ring gauges by Sir W.G. Armstrong Whitworth and Co. Ltd., 1904

3 1/2" and 4 1/2" ring gauges by Sir W.G. Armstrong Whitworth and Co. Ltd

1904
Two ring gauges and five double ended 'Go - No Go' plug gauges for metric sizes

ring and plug screw gauges

1969
Ring gauge, steel, for London & North Eastern Railway vacuum cylinder. Part R603, 20 November 1934. In cloth sleeve.

Ring gauge

1934
Ring gauge engraved J Whitworth & Co

Ring gauge engraved J Whitworth & Co

Double limit internal plug gauge for 1.5"diam 24 t.p.i. threads.

Double limit internal plug gauge for 1.5"diam 24 t.p.i. threads

1892