Smartlet One
Smartlet One
One concept. Three different personalities
Wear a smartwatch with your Zenith El Primero | Smartlet
Compatibility guide
Wear a smartwatch
with your Zenith El Primero
Smartlet 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.
References
Covered references
20 references covered. All compatible with Smartlet.
| Reference | Smartlet | Lug width | Case | Case material | Dial |
|---|---|---|---|---|---|
| 18.2120.679/01.C498 | Compatible | 20mm | 38mm | Rose Gold | Silver |
| Cal.146D-1960 | Compatible | 19mm | 38mm | Stainless Steel | White |
| Cal.146D-1962 | Compatible | 19mm | 38mm | Stainless Steel | Black |
| 146H-1963 | Compatible | 19mm | 38mm | Stainless Steel | Silver |
| Proto-EP36000 | Compatible | 19mm | 38mm | Stainless Steel | Black |
| A384 Revival 50th | Compatible | 19mm | 38mm | Stainless Steel | Panda |
| A385 Revival 50th | Compatible | 19mm | 38mm | Stainless Steel | Brown Gradient |
| A386 Revival 50th | Compatible | 19mm | 38mm | Stainless Steel | Tri-Color |
| A384 | Compatible | 19mm | 38mm | Stainless Steel | White/Black Panda |
| A385 | Compatible | 19mm | 38mm | Stainless Steel | Brown Gradient |
| A386 | Compatible | 19mm | 38mm | Stainless Steel | Tri-Color |
| 01.0043.400 | Compatible | 20mm | 38mm | Stainless Steel | Black |
| 02.2310.400 | Compatible | 20mm | 38mm | Stainless Steel | White Panda |
| 01.2310.400 | Compatible | 20mm | 38mm | Stainless Steel | Black Panda |
| 02.0470.400 | Compatible | 20mm | 38mm | Stainless Steel | Black |
| 03.1260.4039 | Compatible | 22mm | 42mm | Stainless Steel | Black Open |
| 18.2050.4021 | Compatible | 21mm | 42mm | Rose Gold | Silver Open |
| 03.2050.4021 | Compatible | 21mm | 42mm | Stainless Steel | Black Open |
| 03.2061.405/69.M2060 | Compatible | 22mm | 42mm | Stainless Steel | Black |
| 03.2066.405/69.R515 | Compatible | 22mm | 42mm | Stainless Steel | Black |
Smartlet compatibility
The Zenith El Primero uses 19mm to 22mm lug widths depending on reference. Smartlet attaches via the standard spring-bar system. Zero contact with the watch case, lugs, or crystal. Fully reversible in seconds.
Compatible smartwatches
Smartwatches to pair with your El Primero
All smartwatches below can be worn simultaneously with your El Primero via Smartlet.
Apple Watch
View pairing guide →
Samsung Galaxy Watch
View pairing guide →
Garmin Fenix
View pairing guide →
Garmin Forerunner
View pairing guide →
Garmin Venu
View pairing guide →
Google Pixel Watch
View pairing guide →
Withings ScanWatch
View pairing guide →
Polar Vantage
View pairing guide →
Fitbit Charge
View pairing guide →
Huawei Watch GT
View pairing guide →
Coros
View pairing guide →
Suunto
View pairing guide →
Whoop
View pairing guide →
Questions
Frequently asked
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.
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.
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