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 "Down/Up Line" (Down: top-mounted/Up: in circular brass bezel). Below is a large circular black-bakelite commutator with a "Line Occupied" brass slide-bar commutator-locking mechanism and to LHS a small brass release-button. The base-board has a small brass Thompson maker's plate.
