Telegraph block instrument; GNR
Telegraph block instrument; GNR. Pegging 1-needle absolute 3-position/indication with wood-handle and catch-handle/spike commutator. Maker: Tel. Mfg. Co. Ltd, Helsby. (1531).
Details
- Category:
- Signalling & Telecommunications
- Object Number:
- 1964-330/142
- credit:
- Tyer and Company Limited