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TAG Heuer · Alter Ego

Strap for Alter Ego Stainless Steel / Blue MOP /

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 TAG Heuer
Lug width20 mm
Case diameter29 mm
ReferenceWP1312.BA0750
FamilyAlter Ego
MovementETA caliber 956.112 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

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Straps for the Alter Ego WP1312.BA0750

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Alter Ego WP1312.BA0750, seen from the bench

The TAG Heuer Alter Ego WP1312.BA0750 is a luxury sports watch for women launched in the 1990s, featuring a sculptural 29mm stainless steel case with an integrated curved bracelet. Powered by the ETA caliber 956.112 Swiss automatic movement, it combines architectural design with functional reliability. The watch has radial indices, stick hands, and an integrated date window at 6 o'clock, with 30m water resistance for daily wear. The 20mm lug width is proportioned to complement the 29mm case diameter without adding excessive bulk.

Frequently asked questions

What is the lug width of the TAG Heuer Alter Ego WP1312.BA0750?

The lug width of the TAG Heuer Alter Ego WP1312.BA0750 is 20mm. This measurement represents the internal distance between the case lugs and determines compatibility with aftermarket straps. Always verify this measurement before purchasing a replacement strap.

Which strap material is best suited for the TAG Heuer Alter Ego WP1312.BA0750?

For this model we recommend alligator for maximum aesthetic refinement, vegetable-tanned calf for tactile evolution over time, or structured rubber for daily practicality. Your choice depends on usage frequency and colour preference: dark brown alligator enhances the steel, cognac calf offers warmth, black rubber ensures sporting versatility.

How do you change the strap on the TAG Heuer Alter Ego WP1312.BA0750?

The strap is changed by removing the spring bars that connect the strap to the case lugs. Use a dedicated tool (spring bar tool) to compress the internal springs and extract the bars. Insert the new bars into the replacement strap, align it with the lugs and compress again until locked. This is a delicate operation: we recommend assistance from a watchmaker if uncertain.

Is an aftermarket strap with a 20mm lug width guaranteed compatible with the WP1312.BA0750?

Yes, any strap with a 20mm lug width is physically compatible. However, Milano Straps also recommends verifying total circumference (which depends on case curvature) and strap height. Our 20mm straps are optimised for case proportions similar to the WP1312.BA0750.

What is the average lifespan of a leather strap for this watch?

A quality leather strap (calf or alligator) with vegetable tanning has a lifespan of 2-4 years with regular wear, depending on usage frequency, climate (humidity/dryness) and maintenance. Structured rubber lasts 3-5 years. Casati Milano guarantees its handcrafted straps for 18 months and recommends periodic maintenance to extend useful 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