The Vintage Wrist Watch Company has dated this piece to the 1900s.
The watch has a Swiss 17-jewel stem-winding movement which is working nicely.
HMS Impregnable was a training ship situated in Devonport. She was launched in 1810 and converted to a training ship in 1862 (photo attached of HMS Impregnable in 1910… the photo was taken from the internet and is not included in the sale).

The watch measures 50mm diameter excluding the winding stem and the loop. The case is silver and there are hallmarks inside the three covers for Birmingham 1909, with a case maker’s mark for Aaron Dennison. Dennisons was a Birmingham based watch case manufacturer who supplied most of the cases for Waltham UK.

The case is in good condition and the front cover has a small central lens which is surrounded by dark blue enamel filled Roman numerals.
The winding crown pushes in to open the front cover.
Inside, there is an acrylic lens which is in good condition.

The signed dial is in good condition with original blued steel hands (including the special half hunter hour hand so that the time can be read when the cover is closed), a subsidiary seconds dial and outer minute markers with red numbers.
The watch comes in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1900s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page