Strap for Master Collection Date 38.5 Yellow Gold

The lug width of the Longines Master Collection L2.628.6.78.3 is 20 mm. This measurement represents the distance between the two attachment points on the case where the strap is secured via spring bars. To verify, check the lateral pins: a correctly fitted strap will attach without lateral play and will not protrude beyond the case edges.

For yellow gold, we recommend natural alligator in cognac or dark brown tones, or Italian vegetable-tanned calf leather. Alligator enhances formality and pairs naturally with the patina that gold develops over time, whilst calf offers daily durability. Shell cordovan is less ideal for gold cases, as its burgundy hue creates visual contrast rather than cohesion. All materials are available in 20mm compatible straps at milanostraps.it.

To change the strap on a 20mm lug width watch, you must release the pin (spring bar) on both sides of the case using a dedicated spring bar tool or by consulting a qualified watchmaker. Remove the old strap by extracting the spring bars from the lug holes, then insert the new strap by aligning the pins to the lugs and pressing until the spring bars click into position. If you lack experience, consult Casati Milano for professional replacement.

Yes, any strap with a 20mm lug width is compatible with the Longines Master Collection L2.628.6.78.3. Milanostraps.it straps are tested and fully customisable: you can select material, colour, thickness and bespoke length. For a more integrated solution, Casati Milano manufactures bespoke leather straps with a matching yellow gold buckle.

Lifespan depends on material and usage. A vegetable-tanned alligator strap typically lasts 3–5 years with daily wear, developing natural patina. Italian box calf offers 2–4 years of service, whilst shell cordovan can reach 5–7 years owing to fibre robustness. Exposure to perspiration, water and heat accelerates ageing. All milanostraps.it straps include an 18-month warranty and can be refurbished by Casati Milano.