Original Calvin Klein K37153 / K600.041.257 / K600041257 Leather Black 30mm watch strapThis watch strap from Calvin Klein fits on the watch model K37153 / K600.041.257 / K600041257. Please click on Alternatives to view all alternative straps. The lug width of this watch strap is 30mm, the widest part of the strap has a width of 30mm. This watch strap has a straight end. This means that this watch strap will also fit on other watch models (from the same brand but also other brands), provided that the width of the strap is the same and the original strap also has a straight end. Please read the Product features for more information about this strap.