Zenith 03.0510.4021/02.C683

The contemporary flavored Zenith 03.0510.4021/02.C683 would be an ideal accessory for those who look for a reliable mechanical watch that is not only wrist flattering, but also offers the delicateness of Swiss traditional watchmaking. This premium timepiece is powered by the manufacture caliber El Primero 4021H within its superior steel on leather construction, and features exhibition caseback and partially open worked guilloche dial.


This handsome luxury wrist watch belong to the brand’s Class El Primero T Open series for gents. But, despite being labeled for men, the timepiece isn’t too large for women so that those who are going for a masculine flavored wrist accessory can also wear it, too.

As expected from Zenith, behind its gorgeous appearance, there are carefully selected materials and components that are finely executed with such precision craftsmanship to ensure that the watch’s beauty, as well as its sophisticated offerings would remain as is for decades.

Similar to its other variants, this Zenith 03-0510-4021-02-C683 watch’s well crafted round case that is made of high quality stainless steel has a diameter of 40mm and approximately 15mm thick. Meanwhile, its Black bracelet that is made of genuine alligator-skin measures around 22mm wide. The timepiece is comfortable to wear thanks to the ergonomic design, and for convenient fitting, its supple yet supportive strap comes equipped a “Zenith Star” stamped, adjustable deployant folding clasp in stainless steel.

Allowing you to take a glance at the workshop-crafted Zenith’s caliber El Primero 4021H inside, the back of the case features sapphire display, while its Silvered dial is open worked at the 10 o’clocks position to shows you the heart of the movement.

The caseback is securely held in place by six screws, and as usual, is engraved with markers. While upfront, its face is decently covered with a curved sapphire glass, which treated to be more scratch resistant to makes it even more durable, and is glare-proofed on both sides for an improved clarity. At the case’s right hand side, there lays a pull-and-push crown in polished steel that is logoed with the brand’s emblem signature and is fluted to makes it easier to use, and alongside, there are two polished steel pushers for the watch’s chronograph functions. In addition, the timepiece’s whole construction is designed to be watertight to 50 meters so that it wont be harmed by slight wetness, splashes, and even light rain, nor fog through time and use.

This Zenith 03.0510.4021/02.C683 T-Open watch’s dial itself is fascinating, too. Bright in Silvered White and decorated with central diamond-pattern guilloché, this dial is fashioned in such manners that makes it looks good, and quite easy to read despite of its complication.

On the dial, there are rhodium faceted hour and minute hands, a slimmer central sweep seconds hand, and a central mounted power reserve skeletonized hand in Rose Gold finish. Along the periphery, there are Rhodium hand-mounted applique alternating arrow and Arabic numeral (12, 2, 4, 6, 8) hour markers, complimented by painted Black minute markers. And within, in addition to the open work at ten, there are 30-minute counter at the 3 o’clock position, Power reserve indicator at the 6 o’clock position, Small seconds subsidiary with a 3-branched hand at the 9 o’clock.

Speaking a bit about the movement, the El Primero 4021H is a fine chronograph automatic movement that is personally developed, built, and decorated by Zenith at its Neuchâtel workshop. This 248-components mechanical caliber is a Chronometer grade with an official certification from COSC so that you can be confident about its performance and reliability. Specifically, this fairly slim 13 lignes self-winding movement contains 39 jewels, beats at an amazing rate of 36,000 alterations per hour, and provides more than 50 hours of power reserve. Its chronograph could measures short time intervals to an appreciable accuracy of 10th of a second. The Zenith El Primero 4021H that is fitted in this watch features a metal oscillating weight that is decorated with “Grain d'Orge” guilloché pattern.

Anyway, for all of its quality offerings, this men’s Stainless steel on Black crocs leather Silver guilloché dial Zenith El-Primero T Open 03.0510.4021/02.C683 chronograph automatic watch is reasonably priced with an original manufacturer suggested retail price of $8,100.00.

Watch Specification

Brand:	Zenith
Collection:	Class El Primero
Series:	T Open
Model number:	03.0510.4021/02.C683 Ref. 03-0510-4021-02-C683. also referred as 03.0510.4021/02.C683.
Watch style:	Gents, Dress, Elegant, Contemporary
Display type:	Analog
Movement:	Swiss automatic Zenith El Primero 4021H. In house, Le Locle mechanical manufacture calibre El Primero 4021 H that is developed, built and workshop-crafted by Zenith. Swiss made, automatic self-winding mechanical movement. Chronometer grade certified by C.O.S.C. Specs Functions: Three hands, Chronograph with up to 1/10 a seconds accuracy, Small seconds, Power reserve indicator from hour axis. Size: 13‴ lignes (Ø 30.5 mm), 7.75 mm thick. Consists of 248 parts. 39 jewels. beats at 36,000 vph (5 Hz). provides ± 50 hours of power reserve. Bi-directional winding. Central rotor on ball bearings. Shock resistant. “Zenith Star El Primero” decorated rotor, oscillating weight with “Grain d'Orge” guilloché pattern.
Functions:	Hour, Minute, Small Seconds, Chronograph, Power Reserve
Dial:	Silver Central guilloché decorated Silver dial with open-work at 10 that shows the “heart” of the El Primero caliber. Rhodium faceted hour and minute hands. 18kt rose gold power reserve hand, with black nickel coating. Rhodium hand-mounted applique, alternating arrows and Arabic numeral hour markers. painted Black minute markers around the outer rim. 30-minute counter at 3. Power reserve indicator at 6. small seconds with a 3-branched hand at 9.
Window:	Sapphire Crystal scratch resistant, anti-reflective coated on both sides.
Case:	Stainless Steel Round, Ø 40 mm w/o crown, 47 mm lug to lug, ± 15 mm thick. high polished with satin finished horn.
Bezel:	Stainless Steel stationary bezel. mirror polished.
Caseback:	See-thru stainless steel with sapphire display. secured with 8 screws, engraved.
Crown:	Non-screw crown Stainless Steel. fluted. logoed. with two steel pushers alongside.
Bracelet:	Alligator / Crocodile leather Black, textured pattern. Handmade, features tonal stitching. ± 22 mm wide, ± 7.5 inches long --men standard length.
Clasp:	Deployant folding clasp Stainless Steel, stamped, adjustable.
Notable Features:	Calendar Chronograph Open-worked dial Transparent exhibition caseback
Water resistant:	50 m (5 ATM / 165 feet) daily wear, capable to withstand splashes of water and very light rain.
Additional info:	-