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Steinhart · Pilot

Strap for Nav B-Chrono 47 mm

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
22 mm strapsAll Steinhart
Lug width22 mm
Case diameter47 mm
ReferenceC0403
FamilyPilot
MovementETA caliber 7750 hours, minutes, small seconds | date, day | Chronograph
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Pilot C0403

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Pilot C0403, seen from the bench

The Steinhart Pilot C0403 is a 47mm stainless steel aviation chronograph featuring an ETA caliber 7750 automatic movement with complete chronograph functions: hours, minutes, small seconds, date and day of the week. The watch displays a pilot-style dial with white batons and high contrast, protected by an anti-scratch sapphire crystal. The 22mm lug width is proportioned to the oversized case, ensuring proper wrist placement without visual imbalance.

Frequently asked questions

What is the lug width of the Steinhart Pilot C0403?

The Steinhart Pilot C0403 features a lug width of 22mm. This dimension is specific to this 47mm model and is essential for proper strap compatibility. Always measure within the lug grooves using a digital calliper for maximum accuracy.

Which strap is most suitable for the Steinhart Pilot C0403?

We recommend genuine alligator leather for refined occasions, vegetable-tanned calfskin for sophisticated daily wear, or technical NATO or vulcanised rubber for instrumental usage. All available in 22mm, the choice depends on your intended use and colour preferences.

How do I change the strap on the Steinhart Pilot C0403?

Remove both spring bars using the dedicated extraction tool, supplied free with every strap purchase from Milano Straps. Place the watch on a soft surface, locate the lugs, and gently push the bar vertically towards the case centre. The old strap releases. Repeat symmetrically on the opposite lug and insert the new strap, aligning the holes.

Which aftermarket straps are compatible with the Steinhart Pilot C0403?

Any strap in 22mm width is mechanically compatible. We recommend verifying thickness: straps below 2.8mm may shift laterally within the lugs. Milano Straps' 22mm collections have been curated to express the C0403's avionic vocation and proportions optimally.

How long does a leather strap last on the Steinhart Pilot C0403?

A vegetable-tanned calfskin strap typically lasts 3-4 years of daily wear, developing a beautiful patina over time. Alligator, being denser, reaches 5-6 years. Determining factors include sun exposure, contact with perspiration and fresh water, and frequency of use. Milano Straps offers restoration services and spring bar replacement to extend strap lifespan.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only