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Hamilton · Intra-Matic

Strap for Intra-Matic 68 Auto Chrono Stainless Steel / Silver / Strap

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

Lug width

20mm
20 mm strapsAll Hamilton
Lug width20 mm
Case diameter40 mm
ReferenceH38416711
FamilyIntra-Matic
MovementHamilton caliber H-31 hours, minutes, small seconds | date | Chronograph
Year2018
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 Intra-Matic H38416711

Selected for the 20 mm lug width · workshop selection

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The Intra-Matic H38416711, seen from the bench

The Hamilton Intra-Matic H38416711 is a chronograph that descends from Hamilton's 1960s Intra-Matic family, originally supplied to aviators and timing professionals. The 40mm stainless steel case features a classic sunburst blue dial, tachymeter bezel, and chronograph counters positioned at 12, 9, and 6 o'clock, with a date window at 3 o'clock. It is powered by the H-31 manual-wind movement, a Hamilton-developed mechanical caliber with a 72-hour power reserve and ±5 seconds per day accuracy. The 316L brushed stainless steel case measures 40mm in diameter and requires a 20mm lug width for proper fit.

Frequently asked questions

What is the lug width of the Hamilton Intra-Matic H38416711?

The lug width of the Hamilton Intra-Matic H38416711 is 20 millimetres. This measurement is precise: an 18mm strap will not fit in the lug slots, whilst a 22mm strap will be too tight. Always verify compatibility before ordering by measuring the internal space between the lugs.

What is the best strap for the Hamilton Intra-Matic H38416711?

It depends on your use case: for a classical approach, we recommend vegetable-tanned alligator in cognac tone or brushed calf leather in dark brown, which enhance the blue sunburst dial. For daily practicality, an FKM rubber strap in anthracite or a heavyweight canvas NATO offer versatility without aesthetic compromise.

How do I change the strap on the Hamilton Intra-Matic H38416711?

The H38416711 features fixed lugs (non-deployante): you will need a spring bar tool to compress the internal pins and slide the old strap out of the lug slots. Position the tool on the inner spring of the lug, apply gentle pressure, and slide the strap laterally. The procedure takes approximately 2-3 minutes per side. Avoid improvised screwdrivers that risk scratching the case.

Can I use an aftermarket-compatible strap with the Hamilton Intra-Matic H38416711?

Absolutely. Milanostraps offers a comprehensive collection of aftermarket straps in 20mm specifically tested for compatibility with Hamilton cases. The quality of materials—alligator, vegetable-tanned calf, FKM rubber—guarantees durability and comfort equivalent to or exceeding original straps.

How long does a leather strap last on the Hamilton Intra-Matic H38416711?

A quality leather strap (alligator or vegetable-tanned calf) lasts 3–5 years with daily wear, provided minimal maintenance: avoid prolonged water exposure, dry after contact with moisture, and apply a protective balm every 12–18 months. FKM rubber resists 5–7 years whilst maintaining elasticity and grip.

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