Strap for Constellation Co-Axial 38 Stainless Steel / Yellow Gold / Champagne Lozenge

The lug width of the Constellation 123.20.38.21.08.002 is exactly 20 millimetres. This measurement represents the distance between the pins that connect the strap to the lugs of the case. It is essential to choose a strap of precisely 20mm to ensure proper fit and not compromise the watch's aesthetics.

For a Constellation in yellow gold and steel, vegetable-tanned alligator represents the ultimate choice: exceptionally thin leather that ages beautifully, developing a rich patina. Chromium-tanned calf offers an elegant alternative with greater resistance to wear. Shell cordovan is exceptional for those who appreciate the progressive natural lustre. For more casual use, NATO straps in Ballistic canvas provide versatility and frequent changes without damaging the lugs.

The Constellation 123.20.38.21.08.002 uses a system with spring bars that connect the strap to the case lugs. To replace it, a dedicated tool (spring bar removal tool) is required to extract the pins from each side, then slide off the old strap and insert the new one, repositioning the spring bars. It is advisable to entrust this operation to an experienced watchmaker to avoid scratches on the precious case.

Any strap with a lug width of 20 millimetres is compatible with the Constellation 123.20.38.21.08.002, provided it does not exceed the maximum thickness compatible with the original lugs. Artisanal quality straps in alligator, calf, shell cordovan and goat leather ensure aesthetic proportion and durability. Avoid straps that are too thick as they could touch the crystal during wrist movement.

The lifespan of a leather strap depends on the material and intensity of use. High-quality alligator, worn daily, maintains structural integrity for 5-7 years. Chromium-tanned calf resists 6-8 years with regular use. Shell cordovan can last 8-10 years thanks to its superior density. Vegetable tanning requires greater attention to humidity but develops a fascinating patina. Wear does not mean breakage: it is the natural ageing of a living material.