
2010s Zenith Chronomaster El Primero
A Chronomaster with a stunning grey sunray dial, a large case, and the El Primero 400B automatic movement.
Overview
While the El Primero has mostly been made in its original 38mm size throughout the years, Zenith released a standard issue tri-color version in a larger, more contemporary 42mm case in 2013. Versions with a blue dial and a gray dial soon followed, each featuring a different take on the iconic tri-color design. These larger watches all featured a more spacious dial and a less controversial date window placed at 6 o’clock instead of the traditional 4:30 position. For those with larger wrists—and larger tastes—the 42mm Primero was a godsend and continues to be sought after, especially now that the size has been discontinued from Zenith’s catalog.
Specifications
Brand:
Zenith
Model:
Chronomaster El Primero
Reference:
03.2040.400/26.C496
Year:
2010s
Case Number:
353 702
Case Material:
Stainless steel
Diameter:
42 mm
Lug Width:
21 mm
Thickness:
12.8 mm
Lug-to-Lug:
50.6 mm
Dial:
Gray
Lume:
Super-LumiNova
Crystal:
Sapphire
Movement:
Automatic
Caliber:
El Primero 400B
Bracelet/Strap:
Zenith black alligator strap with deployant buckle
Max Wrist Size:
Hand model has a wrist size of 6.1 in
Condition
Case: The case is very clean and shows minimal signs of wear with only a few small hairlines throughout. The watch appears to have been polished at some point, but the lugs remain thick with the original brushed finish still showing. The case back shows minimal wear as well with sharp, fully legible engravings. The bezel is practically flawless with no nicks or scratches present.
Dial, Hands, & Crystal: The dial and hands are mint with no imperfections and fully functioning Super-LumiNova. The front and rear sapphire crystals are squeaky clean and scratch-free.
Bracelet/Strap: The Zenith alligator strap is in unworn condition with no imperfections. The original protective stickers are still present on the depoyant clasp.
Performance
Functions: All functions including the crown-winding, time-setting, date-changing, and chronograph start/stop/reset are working as expected.
Service History: Unknown.
What’s Included

What’s Included
Watch
Zenith Chronomaster El Primero on a black alligator strap.
Box/Papers
Boxes, instructions, hang tag, leather card holder, and guarantee without date.
Extras
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Each watch is thoroughly evaluated and guaranteed to be authentic unless explicitly stated otherwise. Prior to any sale, we are happy to provide additional photos or videos of the watch, movement, and accessories at your request. Once you receive the watch, we allow a 72-hour inspection period during which you may return the watch for a full refund if it is misrepresented.
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Condition Grades
We use the following rubric to assign each watch a condition grade that best represents its external appearance.
Timegrapher Readings
These readings were taken on a Weishi No. 1000 timegrapher approximately one hour after fully winding the watch.

























