Strap for Real Moon Joure

The lug width of the CKRJ3394 is 20mm. This measurement corresponds to the distance between the two lugs, measured from the centre of each lug. To verify compatibility with your strap, measure this distance using a digital calliper positioned perpendicularly across the lug line.

For this astronomical timepiece, alligator leather with vegetable tanning represents the superior stylistic choice: the natural grain of the leather mirrors the technical complexity of the movement without competing with the dial. English vegetable-tanned calf offers a contemporary alternative with evolving patina. NATO cotton and fluoroelastomeric rubber remain robust options for active use.

Obtain a spring bar removal tool. Remove the spring clip from the first lug, gently extract the bar, then insert your new strap. Ensure the spring clip is correctly positioned before securing. If you lack experience, consult a professional watchmaker to prevent damage to the case.

Any strap with a 20mm lug width is compatible with the CKRJ3394. MilanoStraps offers a comprehensive selection of 20mm straps in vegetable leather, alligator, calf, NATO, and rubber—all tested and ready for dispatch. Always verify lug width before ordering.

Strap longevity depends on usage frequency and environmental conditions. A vegetable-tanned calf or alligator strap, worn daily, maintains structural integrity for 3-5 years before replacement becomes necessary. Prolonged exposure to moisture and heat accelerates wear. Periodic maintenance—gentle cleaning and conditioning—significantly extends service life.