
2020 Zenith Chronomaster El Primero
A Chronomaster with a lovely silver 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 decided to release a standard issue tri-color EP 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 with 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 this size has been discontinued from Zenith’s catalog.
Specifications
Brand:
Zenith
Model:
Chronomaster El Primero
Reference:
03.2040.400/69.C494
Year:
2020
Case Number:
528 661
Case Material:
Stainless steel
Diameter:
42 mm
Lug Width:
21 mm
Thickness:
12.8 mm
Lug-to-Lug:
50.6 mm
Dial:
Silver
Lume:
Super-LumiNova
Crystal:
Sapphire
Movement:
Automatic
Caliber:
El Primero 400B
Bracelet/Strap:
Zenith dark brown alligator strap with deployant buckle
Max Wrist Size:
Hand model has a wrist size of 6.1 in
Condition
Case: The unpolished case shows light signs of wear with some hairlines and few small nicks on the case sides. The case back shows minor wear as well and retains sharp, fully legible engravings.
Dial, Hands, & Crystal: The silver sunray dial and hands are in excellent condition and the sapphire glasses on case front and case back are clean and scratch-free.
Bracelet/Strap: The dark brown alligator strap is in great condition with minimal signs of wear and fraying.
Performance
Functions: All functions including the crown-winding, time-setting, date-setting, 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 dark brown alligator strap.
Box/Papers
Boxes, instructions, hang tag, microfiber cloth, leather card holder, and guarantee dated February 2020.
Extras
Second-hand purchase documentation from Jubilee.
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Authenticity Guarantee
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.
We spend a considerable amount of time researching any watch we plan to source. This includes cross-checking the visual details, case numbers, and movements using examples sold by other reputable dealers and buying guides published by subject matter experts. We set very high standards and will not consider any watch with questionable parts or inconsistencies that cannot be verified elsewhere.
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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.
























