Longines
Master Collection L2.773.4.51.8— lug 21mm
Longines Master Collection L2.773.4.51.8: 21mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 21mm lug width to preserve the original sartorial balance."
Technical Specifications
Longines L2.773.4.51.8The essential strap measurement.
Browse 21mm straps →L2.773.4.51.8
Longines caliber L678.2 Hours, Minutes, Small Seconds, Additional 24 Hour Hand (fixed) | Date, Day, Month | Chronograph | Moonphase
The Heritage
Compatible Straps
Selected for the 21mm lug width of the Master Collection
FAQ
What is the exact lug width of the Longines Master Collection L2.773.4.51.8?
The lug width (lug distance) of the Longines Master Collection L2.773.4.51.8 is 21mm. This dimension is specific to the 42mm model and is determined by the distance between the case lugs. To verify it, measure the linear distance between the two spring bar holes using a digital calliper positioned perpendicular to the lugs.
Which strap materials are most suitable for this watch?
For the Master Collection L2.773.4.51.8 we recommend: vegetable-tanned alligator for formal elegance and visible patina development; shell cordovan for natural lustre and superior durability; solid-coloured calf leather for daily versatility; FKM rubber or NATO fabric for sports contexts. The choice depends on intended use and desired colour harmony with the blue dial.
How do you change the strap on the Longines Master Collection L2.773.4.51.8?
Strap removal requires a spring bar tool. Place the watch on a soft surface, locate the lateral spring bar pins, insert the tool into the slot beneath the pin, and push gently downward to release it. Once the pin is extracted, the strap disengages. Repeat on the opposite side. To install a new strap, position the pins into their respective lugs and ensure they click securely into place.
Are there aftermarket straps compatible with the Longines Master Collection L2.773.4.51.8?
Yes. Any strap designed for 21mm lug width is compatible with the L2.773.4.51.8. On milanostraps.it you will find a selection of 21mm straps in various materials and colours, ready to ship or customisable at the Casati Milano atelier with bespoke sizing and finishes.
How long does a natural leather strap last on a Longines Master Collection watch?
A quality leather strap, whether vegetable-tanned or shell cordovan, will last 3-5 years under moderate daily wear. Longevity depends on sun exposure, humidity levels, and frequency of wear. Vegetable-tanned leather develops a desirable patina, whilst shell cordovan maintains greater structural rigidity over time. Periodic maintenance—gentle cleaning and conditioning—significantly extends the usable lifespan.