Rolex
Day-Date 36 118238-0112— lug 20mm

The Rolex Day-Date 36 118238-0112 features a precisely engineered lug width of 20.00 mm. This dimension is specific to the Day-Date 36 and reflects the correct proportional relationship between the 36 mm Oyster case and the standard male wrist. Measurement should be conducted with digital callipers, perpendicular to the case, between the inner edges of both lugs, tolerating ±0.2 mm. Only 20 mm compatible straps fit this reference correctly.

Alligator leather with vegetable tanning is the natural choice for the 118238-0112's 18k yellow gold case. The geometric scale pattern and developing patina mirror the material nobility of gold beautifully. Alternatively, dark brown box calf offers superior durability and provides elegant contrast with the case finish. Shell cordovan serves as a versatile alternative, offering exceptional resistance to staining and developing a rich, inherent patina suitable for daily wear.

Strap replacement requires a spring bar remover tool. Position the watch on a soft cloth surface and gently access the lower portion of each lug. Using the removal tool, carefully press the small lever against the spring bar until you hear the release click. The spring bar retracts and liberates the strap from the case. Work methodically to avoid micro-scratching the yellow gold case, which is susceptible to abrasion. The replacement strap must measure precisely 20 mm in width.

Yes, provided they meet the 20 mm lug width specification. A bespoke artisanal strap in alligator, cordovan or box calf from a specialised producer is fully compatible and often exhibits superior construction quality compared to the metal bracelet. The critical factor is dimensional precision: exactly 20 mm, straight end type (non-curved), and thickness consistent with the Day-Date's formal aesthetic. High-quality aftermarket straps develop character-rich patina over time, often ageing more gracefully than metal alternatives.

Leather strap longevity depends on usage frequency, leather quality and climate conditions. A vegetable-tanned alligator strap of artisanal quality typically lasts 4-6 years under moderate daily wear. Cordovan, owing to its superior fibre density, achieves 6-8 years. Box calf generally wears within 3-4 years. Sun exposure, perspiration and humidity accelerate ageing. Proper maintenance—avoiding water contact, regular gentle cleaning with dry cloth—significantly extends lifespan. An artisanal strap represents an investment worthy of dedicated care.