Strap for Nav B-Uhr 47 Automatic B-Type

The Steinhart Pilot F0323 features a lug width of 22 millimetres. This dimension, measured from inner edge to inner edge of the lug apertures where the strap attaches, is specific to this model and requires dedicated straps to ensure proper fit and aesthetic proportion between case and wrist wear.

We recommend a black alligator strap for absolute elegance, an Italian-made NATO strap in regenerated yarns for historic versatility, or vegetable-tanned calf leather if you appreciate natural patina development. Your choice depends on intended use: formal, sports-daily, or aquatic. All 22mm straps in the Milano Straps collection are compatible with this model's lugs.

Remove the spring bars connecting the strap to the case lugs using a dedicated spring bar tool. Press the elasticated pin inward to release the old strap. Insert the new strap into the lugs, reinsert the spring bars, and verify they are firmly seated. The operation takes minutes and requires no professional assistance.

Yes, provided it features a 22mm lug width specification. Quality aftermarket artisanal straps (such as those offered by Milano Straps) frequently offer superior materials and finishing compared to standard factory straps. Always verify the 22mm specification at purchase.

Durability depends on leather type and usage frequency. Premium alligator resists 3–5 years with regular maintenance (cleaning, light conditioning). Vegetable-tanned calf leather lasts similarly but develops visible patina. NATO straps, less exposed to leather wear, endure 5–10 years. Natural leather ageing is part of the appeal; it is character gained, not defect encountered.