Strap for Master Collection 42 Date Stainless Steel / Blue / Alligator

The lug width of the Longines Master Collection L2.893.4.92.0 is 21mm. This technical specification indicates the distance between the two pins that connect the strap to the case. Correct measurement is essential: measure from the centre of one pin to the centre of the other, excluding the case body itself.

The Master Collection L2.893.4.92.0 favours alligator leather straps for formal contexts, compact calf leather (preferably vegetable-tanned) for aesthetic versatility and harmonious ageing, or vulcanised rubber for sports use. Alligator reinforces formality; vegetable-tanned calf develops patina over time; rubber maintains the watch's nautical vocation given its 300m water resistance.

Strap change is performed using a specialist tool called a spring bar remover. Position the tool under one of the two lateral pins, apply gentle pressure to release the internal spring, and the pin slides out of the case. Repeat for the other side. Atelier Casati Milano offers this service by appointment with personal consultation on leather selection.

Yes, any strap with a 21mm lug width is compatible with the L2.893.4.92.0. Online at milanostraps.it you will find a selection of 21mm straps ready for dispatch, customisable in sizing, initials and thread colour. For particular wrist circumference requirements or exclusive materials, Casati Milano creates bespoke straps by appointment.

A premium leather strap (alligator, calf, shell cordovan) lasts an average of 5-8 years under normal use conditions. Vegetable-tanned leather ages with greater grace, developing patina. Atelier Casati Milano offers an 18-month guarantee on handcrafted straps, during which technical interventions and replacements are covered in case of construction defects.