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Wear a smartwatch with your Zenith El Primero | Smartlet
Zenith compatibility guide
Wear a Smartwatch
with your Zenith El Primero
Smartlet One is compatible with all Zenith El Primero references. Lug widths range from 19mm to 22mm — all natively supported with no adapter. Installation uses the standard spring-bar system — no modification to the watch, fully reversible in seconds.
The El Primero was born in 1969 — the world's first integrated automatic chronograph, beating at 36,000 vph. Zenith kept it alive when the Swiss industry went quartz. It powered the Rolex Daytona from 1988 to 2000. The A386 revival dial is reproduced exactly as it appeared that year: tri-colour subdials, stepped bezel, pump pushers. That history does not disappear when you wear a smartwatch. Smartlet makes both coexist.Collector note
El Primero lug compatibility
The A386 revival uses 19mm lugs — unusual in the modern market. Smartlet supports this natively. The Chronomaster Original at 38mm runs 19mm. Larger Sport references step to 22mm. All within the native range.
Full reference database
Zenith El Primero references
40 references. All compatible with Smartlet One.
Reference
Material
Dial
Lug
Smartlet
18.2120.679/01.C498
Rose Gold
Silver
20mm
Compatible
Cal.146D-1960
Stainless Steel
White
19mm
Compatible
Cal.146D-1962
Stainless Steel
Black
19mm
Compatible
146H-1963
Stainless Steel
Silver
19mm
Compatible
Proto-EP36000
Stainless Steel
Black
19mm
Compatible
A384 Revival 50th
Stainless Steel
Panda
19mm
Compatible
A385 Revival 50th
Stainless Steel
Brown Gradient
19mm
Compatible
A386 Revival 50th
Stainless Steel
Tri-Color
19mm
Compatible
A384
Stainless Steel
White/Black Panda
19mm
Compatible
A385
Stainless Steel
Brown Gradient
19mm
Compatible
A386
Stainless Steel
Tri-Color
19mm
Compatible
01.0043.400
Stainless Steel
Black
20mm
Compatible
02.2310.400
Stainless Steel
White Panda
20mm
Compatible
01.2310.400
Stainless Steel
Black Panda
20mm
Compatible
02.0470.400
Stainless Steel
Black
20mm
Compatible
03.1260.4039
Stainless Steel
Black Open
22mm
Compatible
18.2050.4021
Rose Gold
Silver Open
21mm
Compatible
03.2050.4021
Stainless Steel
Black Open
21mm
Compatible
03.2061.405/69.M2060
Stainless Steel
Black
22mm
Compatible
03.2066.405/69.R515
Stainless Steel
Black
22mm
Compatible
Smartwatch pairing
Smartwatches to pair with your El Primero
Apple Watch
Samsung Galaxy Watch
Garmin Fenix
Garmin Forerunner
Google Pixel Watch
Withings ScanWatch
Questions
Frequently asked questions
Is Smartlet compatible with the Zenith El Primero?
Yes. El Primero references use 19mm to 22mm lugs — all natively supported. No adapter required. The El Primero 400 calibre is completely unaffected.
Does Smartlet affect the El Primero movement?
No. Smartlet attaches via standard spring bars. The column wheel chronograph mechanism running at 36,000 vph is not touched.
Which El Primero lug width fits Smartlet?
All of them. The A386 Revival at 19mm, Chronomaster Original at 19mm, and Sport references at 22mm are all natively supported.
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Watch lovers who own a Zenith El Primero also pair Smartlet with these models.
Questions
Frequently asked
Does Smartlet work with the Zenith El Primero?
Yes. El Primero references use 19mm to 22mm lugs, all natively supported by Smartlet. No adapter required.
Which El Primero references are compatible?
All current references: 38mm, 42mm, Chronomaster. The 19mm to 22mm lug range is fully covered by Smartlet.
Can I wear a smartwatch with my El Primero?
Yes. Smartlet attaches in seconds via standard spring bars, no modification required, fully reversible.
