Block Signal Switch
- maker:
- William Henry Preece
Block instrument; a Preece switch-handle "Off/On" commutator, which would normally accompany its Preece instrument. A wooden-handled brass switch mounted on a square board with 3 brass terminals at rear.
Details
- Category:
- Signalling & Telecommunications
- Object Number:
- 1911-49
- type:
- block signal switch
- credit:
- H.M. Postmaster General