Telegraph block instrument (sending/receiving)
- Made:
- Hersham
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Science Museum Group
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Telegraph block instrument; SR. Standard absolute pegging/non-pegging 3-position/3-indication. There are 2 vertical banners (black) enamel-plated "Up/Down Line" (Up: top-mounted/Down: in circular brass bezel). Below is a large circular brown-bakelite commutator with a "Line Occupied" brass slide-bar commutator-locking mechanism, but missing the usual small brass release-button to LHS. The base-board has a small brass Thompson maker's plate.
