The Vintage Wrist Watch Company has dated this piece to the 1930s.
The watch has a hand-winding movement, 13,34, which is working nicely. The 13.34 was first introduced in 1910 and was used in many watches during the first World War.
B&Co was Baume & Co, a watch manufacturer and importer based in Hatton Garden, London. They were the Longines agents in the UK for many years.

The watch itself measures 35mm diameter excluding the winding crown and the articulated lugs. The case is silver and there are hallmarks inside the case back for London 1932, together with the sponsor’s mark for Arthur Baume (of Baume & Co). The case is very similar in design to the François Borgel case, an early attempt at producing a water proof and dust proof case… however, as with any vintage watch, it should be kept away from water and moisture. The case is in lovely condition.

The watch glass has minor marking, barely noticeable to the naked eye.
The white enamel dial is signed with the Longines name. There are a few hairline cracks, and some damage at the bottom of the dial.
The watch has a vintage strap, although probably not the original.
The watch will be sent in a new presentation box.
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The Vintage Wrist Watch Company has dated this piece to the 1930s.
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