Strap for Polaris Chronograph Stainless Steel / Grey

The Jaeger-LeCoultre Polaris Q902843J is equipped with 21-millimetre lug width. This dimension is specifically designed to maintain correct aesthetic proportions for the 42mm case. To measure your lug width accurately, position yourself at the centre point between the lugs and measure the internal space: it should be exactly 21mm to ensure proper strap fitting.

For the Polaris Q902843J, we recommend straps in African alligator for elegant styling and durability, or Italian vegetable-tanned calf leather for greater daily versatility. Natural white alligator creates an authentically polar aesthetic that aligns with the watch's purpose, whilst tobacco-brown or burgundy calf offers superior practicality. All our 21mm straps are compatible and made to measure.

Strap replacement is accomplished by removing the pins that connect the case to the lugs. Positioning your watch on its side, you will use a pin remover tool to gently push the pin outward, allowing you to slide off the old strap and insert a new one. Take care not to damage the pin seats and ensure your new strap has the same 21mm lug width.

Yes, you may use an aftermarket strap provided it strictly respects the 21mm lug width specification. MilanoStraps offers a dedicated collection of artisanal 21mm straps compatible with your Polaris. We recommend avoiding generic or elasticated straps: a strap constructed to the same quality standards as your watch ensures longevity and preserves the value of the manufacture.

A quality leather strap, whether alligator or vegetable-tanned calf, offers an estimated lifespan of 8 to 15 years with regular use and proper maintenance. Wear depends on frequency of use, sun exposure, humidity and perspiration. MilanoStraps straps benefit from an 18-month guarantee on manufacturing defects. To extend your strap's lifespan, we recommend allowing natural air drying after moisture exposure and avoiding excessive flexing of the buckle.