Strap for Seamaster PloProf Co-Axial Stainless Steel / Black / Shark

The lug width of the Omega Seamaster PloProf reference 224.30.55.21.01.001 is 24 millimetres. This measurement, exceeding the 22mm standard for dive watches, was chosen to distribute weight evenly across a timepiece with a 55mm diameter case. You can verify it by measuring with a digital calliper between the original strap pins.

The ideal strap depends on your use: alligator with natural grain develops authentic patina over time and provides visual contrast with the case geometry; vegetable-tanned calf offers softness and controlled patina development; shell cordovan delivers extraordinary lustre; treated rubber is perfect for humid environments; Cordura NATO ensures versatility and quick changes. Your choice should reflect how you will use your 224.30.55.21.01.001.

To change the PloProf strap, you must remove the pins connecting the lugs to the case. Use a non-magnetic pointed tool (a pin or dedicated lug removal tool) to gently push the pin from the inside outward. Pull the pin with non-marring tweezers and free the lug. Insert the new strap and reinsert the pin. Verify it is positioned correctly and does not protrude. We recommend having this operation performed at an authorised service centre to avoid case damage.

Yes, but with an important consideration: the artisanal custom straps from milanostraps.it are constructed with precise tolerances for your specific lugs. Although the width is 24mm, microscopic variations in pin geometry can cause imperfect fit. Personalised artisanal straps guarantee impeccable fit and greater durability compared to generic straps, as the lugs are adapted to your specific dimensions.

A natural leather strap with vegetable tanning or alligator lasts an average of 3-5 years with regular use, considering occasional fresh water exposure. Salt water shortens lifespan to 1-2 years if not dried and treated immediately. Shell cordovan resists longer thanks to fibre density, lasting 5-7 years. Treated rubber maintains integrity for 10+ years. The Casati Milano atelier offers an 18-month warranty and can perform restorations or strap replacements while keeping your original lugs intact.