This is a vintage Tudor Oyster 7903 which dates to 1955. 
 
The watch has a Rolex Oyster case with signed case back. It measures 32mm in diameter excluding the screw down Rolex crown. For its age, the case is in very good condition with some pitting on the rear, brushed lugs and polished sides. 
 
The dial shows some signs of wear but with clear and crisp lettering. 
 
The hand wound movement has been professionally serviced and comes with receipt and 12 months warranty from the watchmaker. 
 
The watch has been fitted with a brand new crystal and a new leather strap. It comes with its Tudor guarantee and document wallet as well as a modern Tudor pouch.