This was made in two forms one being a stop watch the other a chronograph. Both had a Wynne meter attached to the rear of the case. The chronograph form was released a year or two after the stop watch. When introduced the stop watch cost 32/6 compared to an ordinary Wynne meter at 6/6. The price rose considerably after World War I.

The wafer pattern was a thin version of the Wynne, when introduced the cost was 8/6, it remained on sale until the early 1930s by which time the price was reduced to 5/6. The meter was available with a ring so that it could be fitted to a watch chain. The scale on this example is only marked to f4, advertisements from the BJA 1913 show the largest stop to be f3.5, also the stop below f5 is marked 5 ½ rather than f5.6. A US dial was also available.