Two covers for the lower reference point of a fundamental bench mark
- Made:
- Great Britain
Two covers for the lower reference point of a fundamental bench mark, 1914
Details
- Category:
- Surveying
- Object Number:
- 1914-155
- Materials:
- iron, cast, enamelled
- Measurements:
-
round cover: diameter 145 mm
square cover: length 243 mm
socket: length 238 mm
- type:
- bench marks
- credit:
- Ordnance Survey
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