Rolex
Lady-Datejust 79178— lug 13mm

The Rolex Lady-Datejust 79178 has a lug width of 13mm. This measurement is specific to this generation of Lady-Datejust in 18-carat gold with a 26mm case. It should be verified using a digital calliper placed internally between the two lugs, flush against the case.

For the Lady-Datejust 79178 in 18-carat yellow gold, alligator belly straps in cognac, honey or tobacco tones are the most coherent choice, complementing the warm reflections of the gold case. Shell cordovan offers exceptional durability and natural lustre. Vegetable-tanned calf leather in black or burgundy provides a refined formal contrast.

Replacing the strap on the 79178 requires 13mm spring bars. Use a spring bar tool or fork-shaped instrument to compress the spring bar ends and slide them free from the lugs. As the case is in gold, it is advisable to protect the surfaces with masking tape and work on a watchmaker's cushion to avoid scratches.

Yes, aftermarket straps compatible with the Lady-Datejust 79178 are available, provided they respect the 13mm lug width and feature a shaped attachment profile that follows the curvature of the gold lugs. milanostraps.it offers a selection of handcrafted 13mm straps specifically made for this lug spacing.

The longevity of a leather strap depends on the material and conditions of use. A quality alligator strap with vegetable tanning and handcrafted construction can last between 3 and 7 years with proper care. Shell cordovan tends to last even longer due to the density of its fibres. Prolonged contact with water and perspiration should be avoided.