Steel centre gauge, Whitworth standard 55 degree a
- J. Chesterman and Co. (maker)
Steel centre gauge, Whitworth standard 55 degree angles. Pattern no. 878, and steel centre gauge, U.S. standard angle, 60 degrees pattern no. 879, both mounted together on a display board (see 2 stroke nos).
- Industrial Metrology
- Object Number:
- thread gauge
- furnishing and equipment
- measuring device - instrument
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