Strap for Modello Uno U1-SP NASA

The lug width of the Modello Uno U1-SP is 22mm. This measurement is the internal distance between the case attachment lugs and is essential for selecting the correct strap. A strap of incorrect width will not fit the watch's attachment points.

There is no universal best choice; it depends on your intended use. For formal daily wear, we recommend vegetable-tanned calf leather in natural tones (brown, tobacco). For sports and outdoor activities, a NATO strap in nylon or canvas is ideal. For maximum versatility, an alligator strap in 22mm with minimalist finishing. Unimatic's design philosophy emphasises simplicity, so avoid straps with intrusive decorations or vibrant colours.

The Modello Uno U1-SP features standard spring bar lugs. To change the strap, use a small spring bar removal tool to gently push the elastic pins toward the centre of the case, releasing the previous strap. Insert the new 22mm strap by first threading one pin into its slot, then pressing the watch gently downward until you hear a click. Avoid forcing to prevent damage to the lugs.

Yes, the Modello Uno U1-SP is fully compatible with aftermarket 22mm straps in any material (leather, NATO, rubber, fabric). Milanostraps offers a wide selection of artisanal straps for this lug width, from Italian calf to genuine alligator, plus NATO and premium rubber options. The quality of construction of the aftermarket strap significantly influences overall comfort and durability.

Longevity depends on tanning quality, material type (alligator, calf, cordovan) and intensive use. An artisan-made vegetable-tanned calf strap, worn daily, maintains structural integrity for 4-6 years before showing significant deterioration signs. Alligator and shell cordovan exhibit superior durability (6-10 years). Nylon NATO straps, if kept dry, easily exceed 10 years. It is important not to expose leather to extreme temperature fluctuations or prolonged moisture, and to dry it after water exposure.