Single wire double line block instrument
Single wire double line block instrument, bell missing, by Tyer & Co. Ltd
Single wire double line block instrument with separate ringing key
Single wire double line block instrument with separate ringing key, bell missing
Details
- Category:
- Signalling & Telecommunications
- Object Number:
- 1964-330/46
- credit:
- Tyer and Company Limited
Parts
Ringing Key for Tyers Block Instrument
Ringing key for single wire double line block instrument
- Object Number:
- 1964-330/46 Pt2
- type:
- block instrument
- Image ©
- The Board of Trustees of the Science Museum
