Deluxe Smiths 17 jewel dennison aquatite cased Bristol cars wristwatch. These are different to the bristol engine siddeley engineering watches in that they are only engraved Bristol, as on the back of the famous car marque. This one is from 1958 and is fully overhauled. The case diameter is approx 33.5mm wide without the winding crown. Fitted with a green alligator pattern hirsch duke strap. Dennison ref 12880 case like most of these types. This one numbered 866820. Birmingham 9 carat gold assay office hallmarked for 1958. 

Bristol cars are currently having a revival, making this particular engraving a more desirable one.