Strap for Datejust 31 Yellow Gold Fluted / President / Black

The Rolex Datejust 31 reference 178278-0068 has a lug width of 16mm. This measurement should be taken with a digital calliper positioned internally between the two lugs, in direct contact with the lateral walls of the case, yielding a clean 16mm reading.

For an 18kt yellow gold case measuring 31mm, an alligator strap in vegetable tanning is the most coherent choice: the Alligator grain texture complements the Fluted bezel beautifully. Shell cordovan offers a compact, mirror-like surface that enhances the monochromatic warmth of the gold. Both options require a 16mm head with reduced thickness to suit the low-profile lugs of the Datejust 31.

The strap is removed by compressing the springbars that connect the lugs to the case. Use a dedicated springbar tool or fork-tip screwdriver, carefully engaging the inner clip of each lug to avoid scratching the gold. The process takes roughly two minutes per side; for precious metal cases it is advisable to rest the watch on a soft cloth and, if in doubt, entrust the operation to a watchmaker or the Casati Milano atelier.

Yes. Any strap with a 16mm attachment and a flat or contoured head of moderate thickness is compatible. Milano Straps offers a curated selection of handcrafted 16mm straps in alligator, calf, shell cordovan and technical materials, available bespoke or ready to ship online, all compatible with the Datejust 31 lugs.

Longevity depends on leather quality and frequency of wear. A premium vegetable-tanned alligator strap, worn in rotation and kept away from excessive moisture and perspiration, retains its structural and aesthetic integrity for 3 to 5 years. Shell cordovan, being denser and less porous, can exceed 5 years. Milano Straps provides an 18-month warranty against manufacturing defects on all Casati Milano straps.