Ewing Stadialtimeter
- maker:
- Hilger and Watts Limited
Ewing Stadialtimeter, patent no.731489, serial no.E341, by Hilger & Watts Ltd, England, in leather padded case with zip top. With instruction book
Ewing Stadialtimeter, patent no.731489, serial no.E341, by Hilger & Watts Ltd, England, in leather padded case with zip top. With instruction book