Acetylene signal lamp with heliograph attachment designed by McCaw in 1907
- maker:
- E. R. Watts & Son
Acetylene signal lamp with heliograph attachment designed by McCaw in 1907, made by E.R. Watts, c. 1910
Acetylene signal lamp with heliograph attachment designed by McCaw in 1907, made by E.R. Watts, c. 1910