Telegraphic block instrument
- Made:
- London
Telegraphic block instrument, non-Western Region Tyer's No. 11 train key staff apparatus, numbered TAG 602 S, probably Ardgay / Lairg, by Tyer's & Co., London.
Telegraphic block instrument, non-Western Region Tyer's No. 11 train key staff apparatus, numbered TAG 602 S, probably Ardgay / Lairg, by Tyer's & Co., London.
