Technical Archive

Hamilton
Intra-Matic H38755131— lug 20mm

Hamilton Intra-Matic H38755131: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Intra-Matic 42 Stainless Steel / Black / Bracelet

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Hamilton H38755131
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

H38755131

Movement

ETA caliber 2892-A2 Hours, Minutes, Seconds | Date

The Heritage

The Intra-Matic represents the modern reinterpretation of a 1960s Hamilton design. The model is equipped with the automatic ETA 2892-A2 caliber, providing hour, minute, second and date indications. The case features the clean lines typical of the reference period, with the crown integrated into the side profile.

FAQ

What is the lug width of the Hamilton Intra-Matic H38755131?

The lug width of the Hamilton Intra-Matic H38755131 measures exactly 20 millimeters. This dimension is specific to the model and represents a deliberate design choice by Hamilton, intended to maintain visual balance between the case and the strap. The measurement is taken by positioning a digital caliper perpendicular to the case terminals where the strap attaches.

Which strap is most suitable for the Intra-Matic H38755131?

For the Intra-Matic H38755131, a calf leather strap represents the most balanced choice: it offers aesthetic versatility thanks to its fine grain, maintains an elegant profile without excess, and is appropriate for both formal and casual contexts. Alternatively, an alligator strap conveys greater sophistication for formal occasions, while a cotton NATO strap returns the watch to its sporty and pragmatic vocation. The choice depends on your primary usage context.

How do I change the strap on my Hamilton Intra-Matic H38755131?

To change the strap on the H38755131, you will need a specific tool called a spring bar remover. Position the watch with the lugs facing downward, insert the tool tip into the groove of the case terminal to compress the spring attachment, then gently extract the worn strap. Insert the new strap ensuring the lug engages firmly on both sides. If you are uncertain, entrust the operation to a professional watchmaker.

What is the best aftermarket strap compatible with this model?

Aftermarket straps compatible with the H38755131 must have a width of 20 millimeters. The best aesthetic results are achieved with high-quality leather (calf, alligator) featuring natural patina, or with high-density cotton NATO fabrics. Always verify the quality of stitching, as an inexpensive strap could compromise the watch's elegance and deteriorate quickly with regular use.

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

The lifespan of a leather strap depends on material quality and intensity of use. A well-made calf or alligator leather strap, worn daily, maintains structural integrity for 3-5 years before displaying visible signs of wear. Factors such as humidity, sun exposure, and wrist perspiration accelerate the aging process. Regular maintenance (gentle cleaning, occasional conditioning) extends the strap's useful life.