Thumbnail [WTS] Zenith Defy Classic Aero Chronograph El Primero 46mm - Custom 3D printed Bezels $1,999 1

Thumbnail [WTS] Zenith Defy Classic Aero Chronograph El Primero 46mm - Custom 3D printed Bezels $1,999 2

Thumbnail [WTS] Zenith Defy Classic Aero Chronograph El Primero 46mm - Custom 3D printed Bezels $1,999 3

Thumbnail [WTS] Zenith Defy Classic Aero Chronograph El Primero 46mm - Custom 3D printed Bezels $1,999 4

Thumbnail [WTS] Zenith Defy Classic Aero Chronograph El Primero 46mm - Custom 3D printed Bezels $1,999 5

Thumbnail [WTS] Zenith Defy Classic Aero Chronograph El Primero 46mm - Custom 3D printed Bezels $1,999 6

Model:	Zenith El Primero	Last Scraped:	Aug. 12, 2025, 3:17 p.m.
Username:	forg0t	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

## Watch Details - **Model:** Zenith Defy Classic Aero Chronograph - **Reference:** 86.0526.4000 - **Movement:** Zenith Calibre El Primero 4000 SC - **Case Size:** 46mm - **Condition:** - Keeps excellent time, strong amplitude (~300). - Crystal, dial, and hands are in excellent shape. - Case sides and lugs show visible scratches (see video/photos). - **What’s Included:** - Watch head only (no original bezel) on aftermarket strap/buckle - Multiple 3D-printed bezels (Black, Red-Purple, Grey, Dark Blue, Brown) - STL file for bezels; custom color prints available (always willing to print more in future for only cost of shipping) ## Timestamp, Album & Video - [Album/Video](https://immich.forg0t.net/share/_yhHwOELTEwuhqQD_8iReDPGBRrvU6fnRBEpGqyPeKNzIOC5P1JSzCpiuNFm2tqkD0o) - [Timestamp](https://immich.forg0t.net/share/cpjlhqrniOPRlojIGvXrwLWEex_ISbpHU0ENuSMQMwcsVcx1RQNiWJy0biHBtii6cRU) This was a fun project to work on to see how well it works and I personally think it looks better than with the original bezel. *Always willing to show the watch live on video over Google Duo* Price: $1999 shipped for an El Primero via Wise, Bank Wire, Zelle or Crypto. No trades. I **CANNOT** accept Venmo or Paypal (no exceptions) Location: Bay area, CA. Willing to ship outside the US at additional cost [Click here](https://watches.forg0t.net/) for a link to my other watch listings.

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Highest:	$12,640	Lowest:	$2
Median:	$5,199.50	Std. Dev:	±$2,721.79

Estimated Private Party Value $3,090 — $6,763


	Established:	1865
	Website:	http://www.zenith-watches.com/
	Country of Origin:	Switzerland

Zenith SA is a Swiss luxury watchmaker. The company was started in 1865 by Georges Favre-Jacot at the age of 22, in Le Locle in the canton of Neuchâtel. Zenith was purchased by LVMH in November 1999, becoming one of several brands in their watch and jewellery division. Jean-Claude Biver became Interim CEO in 2017, replaced CEO Aldo Magada, who replaced Jean-Frédéric Dufour in 2014.

Zenith has a long reputation for the quality and precision of their watches. It is one of the Swiss watch manufacturers that still produce their own movements in-house.

The El Primero calibre, which was first released in 1969, and still produced today, was one of the first automatic chronograph movements and has a frequency of 36,000 alternations per hour (5 Hz). This high rate allows a resolution of 1⁄10 of a second and a potential for greater positional accuracy over the more common standard frequency of 28,800 alternations per hour (4 Hz). The El Primero was honoured with a 2012 release of the El Primero Stratos Flyback Striking 10th, limited to 1,969 pieces (in honour of the original 1969 release date), that housed the same 36,000 vph movement and a sub-dial measuring in tenths of a second to make a complete rotation every ten seconds.

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