Rolex
Day-Date 36 118346-0023— lug 20mm

The Rolex Day-Date 36 reference 118346-0023 features a lug width of 20 millimetres. This measurement must be verified with precision using a calliper positioned horizontally across the case lugs. A properly fitted strap ensures perfect attachment without oscillation and prevents accelerated wear on the lug holes.

Alligator leather with vegetable tanning represents the traditional choice for the platinum Day-Date 36: its natural texture dialogues with the brushed finish of the case, whilst superior construction ensures decade-long durability. Alternatively, Swiss calf leather in dark shades—black, dark brown, burgundy—offers impeccable formal refinement and a patina that ages with distinction.

Position a digital or mechanical calliper horizontally across the case lugs, measuring the internal distance from one lug to the other. For the Day-Date 36 118346-0023, the result must be exactly 20 millimetres. Avoid superficial or approximate measurements: even 1 millimetre difference compromises strap fit and wearability.

Yes, bespoke straps manufactured with a 20mm lug width are fully compatible. However, it is essential to select a strap maker specialised in luxury watches, capable of guaranteeing rigorous construction tolerances. Generic industrial straps often fail to meet exact specifications and cause oscillation or premature lug wear.

A quality alligator or calf leather strap, with ordinary maintenance, lasts between 7 and 10 years with daily wear. Vegetable-tanned leather ages superior to industrial tanning, developing a natural patina that enhances aesthetic value over time. Prolonged sun exposure, salt water and heat accelerate ageing; proper storage and periodic cleaning significantly extend durability.