
Johnson's "Patent Measurement Indicator"
- Made:
- 1870-1920
- maker:
- R and J Beck

S. Johnson's "Patent Measurement Indicator", by R. & J. Beck, 1870-1894
Details
- Category:
- Surveying
- Collection:
- Sir Henry Wellcome's Museum Collection
- Object Number:
- 1979-250
- credit:
- On loan from the Wellcome Trust