Lug

lug
The projection on each side of a watch's case to which the watch strap or bracelet is attached ...

Lug: In wristwatches, it is the thin metal rod fixed between the case and the strap or bracelet. Markers:On the dial of a watch, markers are used to indicate the 12 hour increments. A marker can be a number, a line, a dot or a gemstone.

Lug Size: (All models): 20 mm
Cosmograph Daytona (model 6239) : Rolex were forerunners in developing the Oyster and Perpetual. Thus, Rolex was not well known for pioneering chronographs.

See also: Water, Pink, Movement, Jewel, Hands