Strap for Seamaster Aqua Terra 150M Master Chronometer 38 Stainless Steel / Grey / Bracelet

The lug width of the 220.10.38.20.56.001 is 19mm. This standard is specific to Omega mid-size models with a 38mm dial and is incompatible with 18mm or 20mm straps. Measure the lug width by positioning a caliper between the metal attachments on the case: the internal distance must be exactly 19mm.

For this model we recommend a brown or cognac alligator with vegetable tanning for an elegant match with the Teak dial, or a bordeaux shell cordovan that develops a rich patina over time. Fine-grained Italian calfskin offers lightness and comfort, while a satin rubber strap maintains the sporty authenticity. A deployment clasp is the ideal closure for precise adjustment without wear.

Use a spring bar tool to gently extract the elastic bars that secure the strap to the case lugs. Position the tool from the underside of the lug, push upward to release the spring bar, then remove the old strap. Insert the new 19mm strap by aligning the holes with the case lugs and press until you hear the spring bar click. Verify that the strap does not protrude from the case edges.

Yes, numerous artisans offer 19mm straps compatible with the Aqua Terra. You will find a selection of alligator, calfskin, shell cordovan and rubber straps, all designed for this lug width. Casati Milano also creates custom straps with personal leather selection and an 18-month warranty, accessible online or at the atelier by appointment.

A quality leather strap, worn daily, typically lasts 18-36 months before showing significant signs of wear such as stitch deterioration or loss of elasticity. Alligator with vegetable tanning tends to last longer thanks to the density of the leather. Exposure to sunlight, sweat and humidity accelerates aging. Casati Milano's 18-month warranty covers manufacturing defects; natural wear is considered patina.