Formex Essence 39mm COSC 2026: Generational Upgrade with Longer Power Reserve
Formex Refines Its Best-Seller: The Essence 39mm COSC Gets Updated
Formex has quietly released a generational update to its Essence 39mm Automatic COSC, the Swiss brand's best-selling model since its original 2018 launch. The 2026 refresh brings meaningful upgrades — including a longer power reserve, screw-down crown, and improved bracelet clasp — while maintaining the proven formula that made the Essence a collector favorite.
What's New in the 2026 Essence 39mm?
The updated Essence 39mm builds on the improvements introduced in the 2025 limited-edition "Space Ghost" model. Key changes include:
- Screw-Down Crown: Upgraded from the previous push-pull design for enhanced water resistance security
- Improved Clasp Extension: The butterfly-style folding clasp now offers 6mm of micro-adjustment without removing the watch
- Upgraded Movement: Powered by the Sellita SW200-2 Power+, a refined version of the familiar SW200-1 with improved efficiency
- 65-Hour Power Reserve: A significant jump from the previous generation's approximately 38-hour reserve
Technical Specifications
| Specification | Details |
|---|---|
| Case Diameter | 39mm |
| Case Thickness | 10.5mm |
| Lug Width | 20mm |
| Lug-to-Lug | 45.5mm |
| Case Material | Stainless Steel with Grade 2 Titanium internal case |
| Movement | Sellita SW200-2 Power+ (COSC) |
| Power Reserve | 65 hours |
| Water Resistance | 100 meters |
| Crystal | Sapphire (flat, AR coating on interior) |
| Price (strap) | $1,850 USD |
| Price (bracelet) | $1,980 USD |
Dial Options
The 2026 Essence 39mm is available in three dial colors at launch:
- Blue (ref. 0339.1.6631) — Formex's signature shade
- Alpine White (ref. 0339.1.6613)
- Radiant Bronze (ref. 0339.1.6681)
All dials feature Formex's horizontal line motif, applied hour markers with Super-LumiNova, and a display caseback showcasing the COSC-certified movement.
Why It Matters
The Essence 39mm has been the backbone of Formex's modern lineup, and these incremental improvements address the most common feedback from owners: power reserve and clasp functionality. At $1,850 on strap, it remains one of the most compelling COSC-certified Swiss watches in its price range, competing with brands like Tissot, Certina, and Mido while offering a more distinctive design and the brand's patented case suspension system.
Frequently Asked Questions
Is the Sellita SW200-2 Power+ significantly different from the SW200-1?
The SW200-2 Power+ shares the same architecture as the SW200-1 but features reworked components for improved winding efficiency, resulting in the extended 65-hour power reserve. It maintains the same 4Hz frequency and COSC certification.
Can I upgrade my existing Essence 39mm with the new clasp?
Formex has not officially announced a retrofit program, but the new clasp system is compatible with existing Essence bracelets. Contact Formex directly for options.
Sources: aBlogtoWatch, Formex Official, Monochrome Watches
Learn more about COSC certification or explore our guide to watch movement types.