MeisterSinger · Single-Hand Watches

Strap for N° 01

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
ReferenceAM3307
FamilySingle-Hand Watches
MovementETA caliber 2801-2 Hours, Minutes, Seconds
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 Single-Hand Watches AM3307

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Single-Hand Watches AM3307, seen from the bench

The MeisterSinger AM3307 is a single-hand watch from the Single-Hand Watches collection, featuring a 43 mm brushed stainless steel case and a 20 mm lug width. It is powered by the ETA 2801-2 automatic calibre, which beats at 28,800 vibrations per hour (4 Hz). The watch embodies the Bauhaus principle of essential functionality with a single hand for intuitive time reading and a clean dial, protected by scratch-resistant sapphire crystal. A transparent caseback allows viewing of the movement.

Frequently asked questions

What is the lug width of the MeisterSinger AM3307?

The lug width of the MeisterSinger AM3307 is exactly 20 mm. This measurement corresponds to the distance between the inner edges of the two lugs on the stainless steel case. Always verify this dimension before purchasing an aftermarket strap to ensure mechanical and aesthetic compatibility.

What is the best strap for the MeisterSinger AM3307?

There is no universal choice, but rather different interpretations of the watch's design philosophy. A grey or dark brown alligator strap emphasises the austere elegance of the satin-finished case. A vegetable-tanned calf leather allows natural patina development. A cotton NATO strap or black rubber provides sporty practicality whilst maintaining formal simplicity. The choice depends on intended context: dressy (alligator), everyday (vegetable-tanned calf), sporty (NATO/rubber).

How do I change the strap on the MeisterSinger AM3307?

Remove the strap using a spring bar tool to gently compress the small springs connecting the strap to the case lugs. Insert the tool into the gap between strap and lug, depress the spring, and extract the strap. Repeat on the other side. Insert the new strap in reverse fashion, ensuring both springs click securely into position. A straightforward operation requiring care to avoid scratching the case.

Can I use a third-party aftermarket strap on my AM3307?

Yes, absolutely. Any strap with a 20 mm lug width is mechanically compatible. Quality depends on material selection: premium leather (alligator, calf, shell cordovan) and artisanal construction ensure superior durability and aesthetic patina development compared to industrial alternatives. Verify that spring bars are in good condition to prevent premature wear on your new strap.

What is the lifespan of a leather strap on the MeisterSinger AM3307?

A quality leather strap (alligator, vegetable-tanned calf) typically lasts 3–5 years in daily use, varying by usage frequency, sun exposure, and humidity. Vegetable-tanned leather ages gracefully, developing patina and natural colour shifts that add character over time. A cotton NATO strap offers comparable longevity whilst maintaining uniform appearance. Rubber tends to degrade within 2–3 years, particularly in environments with intense UV radiation.

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