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Hamilton · Intra-Matic

Strap for Intra-Matic 68 Auto Chrono Stainless Steel / Green / 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
ReferenceH38416560
FamilyIntra-Matic
MovementHamilton caliber H-31 hours, minutes, small seconds | date | Chronograph
Year2021
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 H38416560

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Intra-Matic H38416560, seen from the bench

The Intra-Matic represents the modern reinterpretation of a 1960s Hamilton chronograph. The model mounts the automatic H-31 caliber with hour, minute, small second, date and chronograph functions. The watch has 20mm lugs and maintains the vintage aesthetics of the original design.

Frequently asked questions

What is the exact lug width of the Hamilton Intra-Matic H38416560?

The Hamilton Intra-Matic H38416560 is fitted with a 20mm lug width. This measurement refers to the internal distance between the case lugs (spring bar attachments). To verify, use a calliper positioned between the upper rivets of the case—the result must be exactly 20mm. No tolerance exists: an 18mm strap will be loose, a 22mm strap impossible to install.

Which strap material is recommended for the Hamilton Intra-Matic H38416560?

For the H38416560, we recommend three primary options: 1) Alligator with vegetable tanning for aesthetic longevity and patina development; 2) Chromium-tanned calf in dark shades for structural rigidity and daily wearability; 3) NATO in cotton-silk weave for sportive versatility. Natural vulcanised rubber is ideal for humid environments or dynamic activities. Material choice depends on intended use and desired aesthetic context.

How do I change the strap on the Hamilton Intra-Matic H38416560?

The strap is replaced via spring bars (bayonet-mounted springs) connecting the strap to the case lugs. Equip yourself with a spring bar tool: insert the flat tip beneath the spring from the interior, applying gentle upward pressure to release the lower lug. Repeat on the upper lug. Reverse the procedure to install the new strap, ensuring both springs are fully anchored.

Can I mount a compatible aftermarket strap on my H38416560?

Yes, any strap with a 20mm lug width is compatible. Milanostraps supplies bespoke leather, NATO, and rubber straps specifically for this measurement. Before purchase, verify compatibility by measuring your case lug width or consulting our 20mm catalogue. Quality aftermarket straps often provide superior durability and customisation compared to original equipment.

How long does a leather strap last on the Hamilton Intra-Matic H38416560?

Leather strap lifespan depends on intensity of wear, environmental conditions, and leather grade. A first-quality alligator or calf hide with vegetable tanning withstands approximately 5-7 years with moderate daily wear; exposure to direct sunlight, humidity, and thermal fluctuations reduces this estimate to 3-4 years. Vulcanised rubber exhibits greater longevity (8-10 years). Periodic maintenance (cleaning, conditioning) significantly extends strap life.

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