Patek Philippe · Grand Complications
Strap for Patek Philippe Grand Complications 3940J-025
The Perpetual Calendar 3940 Yellow Gold / Painted Roman takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width

Straps for the Grand Complications 3940J-025
Selected for the 18 mm lug width · workshop selection
What I'm asked about the Patek Philippe Grand Complications 3940J-025
What strap size does the Patek Philippe Grand Complications 3940J-025 take?
The Patek Philippe Grand Complications 3940J-025 needs 18 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.
Can the strap on the Patek Philippe Grand Complications 3940J-025 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Patek Philippe Grand Complications 3940J-025?
Yes, in 18 mm leather. On a 36 mm case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the Patek Philippe Grand Complications 3940J-025?
A 18 mm calf strap, for every day. You'll find it ready in the 18 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
More Grand Complications
- Perpetual Calendar Chronograph 1518 Stainless Steel19 mm
- Perpetual Calendar Chronograph 151819 mm
- Minute Repeater Alarm Philippe Stern21 mm
- Perpetual Calendar Chronograph 249920 mm
- Perpetual Calendar Chronograph 249919 mm
- Perpetual Calendar Chronograph 249919 mm
- Perpetual Calendar Chronograph 249920 mm
- Perpetual Calendar 344818 mm
More Patek Philippe in 18 mm
For changing the strap
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.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
The atelier's website: casatimilano.com





