Ball Watch · Engineer II

Strap for Engineer II Chronometer Red Label

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

Lug width20 mm
Case diameter43 mm
ReferenceNM2028C-SCJ-GY
FamilyEngineer II
MovementBall Watch caliber RR1102C hours, minutes, seconds | date, day | chronometer
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 NM2028C-SCJ-GY

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Engineer II NM2028C-SCJ-GY, seen from the bench

The Ball Watch Engineer II NM2028C-SCJ-GY is a professional-grade chronometer certified by COSC, evolved from 19th-century American railroad watchmaking heritage. The 43mm stainless steel case features brushed surfaces with industrial geometry, housing the Ball Watch caliber RR1102C movement with integrated date/day function and chronograph. The 20mm lug width is fundamental to the Engineer II collection and ensures precise strap compatibility through spring bar attachments.

Frequently asked questions

What is the lug width of the Ball Watch Engineer II NM2028C-SCJ-GY?

The lug width of the Ball Watch Engineer II NM2028C-SCJ-GY is 20 millimetres. This measurement represents the linear distance between the two metal lugs integrated into the case that hold the strap. It is essential to verify this specification before purchasing an aftermarket strap to ensure perfect compatibility.

What is the best strap for the Ball Watch Engineer II NM2028C-SCJ-GY?

The ideal strap depends on your intended use. For professional and formal settings, we recommend alligator or vegetable-tanned calf leather, which develop natural patina over time. For extreme environments or diving, a butyl rubber or synthetic NATO strap is the responsible choice. A fully integrated stainless steel deployante increases the perception of structural compactness of the case.

How do you change the strap on a watch with 20mm lugs?

To change the strap, use a spring bar tool (a small lever specifically designed for this task). Position the tool in the slot beneath the metal lug, exert gentle downward pressure to compress the internal spring, then extract the lug itself. Repeat the operation on the other side. Insert the new strap by aligning the holes at the ends, then reinsert the lugs by gently compressing until they click into place.

Can I use an aftermarket strap compatible with the Ball Watch Engineer II NM2028C-SCJ-GY?

Yes, any strap with a 20mm lug width is compatible. Milano Straps provides high-quality artisanal straps in leather, NATO, and rubber, specifically calibrated for this measurement. Always verify that the spring bars are of the correct length and strength for the mass of the 43mm stainless steel case.

How long does a leather strap last on a watch like the Ball Engineer II?

The lifespan of a leather strap depends on the quality of the tanning, usage, and environment. A calf or alligator strap with vegetable tanning can last 3-5 years with normal daily use. In humid environments or with frequent water contact, durability is significantly reduced. A butyl rubber or synthetic NATO strap lasts considerably longer, up to 7-10 years, as it does not undergo bacterial degradation.

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