Jaeger-LeCoultre · Master Extreme
Strap for Master Compressor Chronograph Stainless Steel Bracelet
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
20mm
Lug width20 mm
Case diameter42 mm
Reference1758121 (aka: Q1758121)
FamilyMaster Extreme
MovementJaeger-LeCoultre caliber 751F hours, minutes, small seconds | Chronograph, column wheel
Year2015
CaseStainless Steel
Straps for the Master Extreme 1758121 (aka: Q1758121)
Selected for the 20 mm lug width · workshop selection
Black Rubberized Alligator Strap with Red Tribal Stitching€185
Matte Dark Gray Alligator Strap€195
Matte Black Alligator Strap — Minimal Stitching€149
Vintage Brown Calfskin Strap — Natural Patina€98
Hammered calfskin strap in cuoio€98
The Master Extreme 1758121 (aka: Q1758121), seen from the bench
The Jaeger-LeCoultre Master Extreme 1758121 (Q1758121) is a chronograph from the Master Extreme family, combining mechanical complexity with sporty wrist presence. The stainless steel case measures 41.50 mm in diameter and houses the in-house caliber 751F movement, featuring hours, minutes, small seconds, and a column-wheel chronograph mechanism. The lug width is 20 mm, a standard measurement for the upper segment that ensures precise fit without lateral play on this model's tapered lugs and sporty profile.
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