Ball Watch · Engineer II

Strap for Engineer II Marvelight

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
ReferenceNM2026C-S6J-GY
FamilyEngineer II
MovementBall Watch caliber RR1103 hours, minutes, seconds | date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Engineer II NM2026C-S6J-GY

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Engineer II NM2026C-S6J-GY, seen from the bench

The Ball Watch Engineer II NM2026C-S6J-GY combines American railroad heritage with Swiss precision engineering. This 40 mm stainless steel 316L sports watch features the Ball Watch caliber RR1103 automatic movement, certified chronometer, displaying hours, minutes, seconds, and date. The tritium hour markers ensure visibility in darkness. The 20 mm lug width provides versatility for strap selection while maintaining visual harmony with the case diameter.

Frequently asked questions

What is the lug width of the Ball Watch Engineer II NM2026C-S6J-GY?

The lug width of the Ball Watch Engineer II NM2026C-S6J-GY is 20 millimetres. This measurement represents the distance between the two horizontal lugs of the case and determines strap compatibility. You can verify it by measuring directly between the attachment points of the original strap with a ruler.

What is the best strap for the Ball Engineer II NM2026C-S6J-GY?

The best strap depends on usage and aesthetic preferences. For formal elegance, we recommend alligator leather or vegetable-tanned calf in dark brown or navy tones. For daily sportiness, a NATO nylon strap in black or a fluoroelastomer rubber strap ensures practicality and durability. The stainless steel case of the NM2026C-S6J-GY pairs naturally with these materials.

How do I change the strap on the Ball Watch Engineer II NM2026C-S6J-GY?

To change the strap, you must remove the spring bars from the lugs. Use a dedicated spring bar removal tool or consult a qualified watchmaker. Position the tool in the small indent below the lug, press to compress the internal spring, extract the pin, then repeat on the other lug. Install the new strap by reversing the procedure.

Are aftermarket straps compatible with the NM2026C-S6J-GY available?

Yes, all straps with a 20mm lug width are compatible with the Ball Watch Engineer II NM2026C-S6J-GY. Milano Straps offers leather, NATO, rubber, and exotic material straps, customisable in colour, thickness, and buckle finish. Compatibility is guaranteed by the standard spring bar attachment system.

What is the typical lifespan of a leather strap for the Ball Engineer II NM2026C-S6J-GY?

A quality leather strap, such as vegetable-tanned calf, typically lasts 2–4 years with moderate daily wear. Longevity depends on frequency of use, exposure to perspiration and humidity, and maintenance. Periodic cleaning and allowing the strap to rest extends its service life. Rubber or NATO straps have longer durability, up to 5–7 years.

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