Hi All, i have a ladies 15k gold watch with a 15k gold brittanic bracelet. There is no makers mark on the dial, the case is marked AB swiss, import marks for UK are there as well as hallmark year date of 1918. The movement is marked Baume and co with 3 stars and 10.85N. The box it came in is a J.W. Benson of Ludgate hill London. Is this watch a Benson, Baume or Longines or something else? Your help is appreciated. Thanks Dave.