# Luxury watchmaker product releases and technical updates

> Live situation record from CLSTR: https://clstr.news/situations/luxury-watchmaker-product-releases-and-technical-updates
> Updated: 2026-09-07T07:27:19.000Z. Sources: 15. Developments: 4.

Various luxury watchmakers have announced new product expansions and technical advancements throughout late August and early September 2026.

Longines refreshed its Master Collection with the introduction of the Master Collection Chrono Monopoussoir, a single-pusher chronograph utilizing the manual winding caliber L799.5 movement. The brand also launched a ‘Home of Elegance’ campaign.

Zenith introduced the Chronomaster Solo Sport, a high-frequency three-hand sports watch featuring the El Primero 3620 movement and a 40mm stainless steel case. This new range includes various dial options such as white, black, and brown, with a specialized black version lacking a date window. The collection is described as having a sleek aesthetic and a compact profile.

Citizen Watch Co. released two limited edition models from its Promaster line to commemorate the 50th anniversary of Eco-Drive technology, including the SKY series ‘Skyhawk’ and the LAND series ‘Tsuno Chrono’.

Seiko expanded its Prospex Speedtimer collection with four new mechanical models, including two automatic chronographs (HBD001 and HBD002) with 42mm cases and the calibre 8R48 movement, and two three-hand date watches (HBC003 and HBC004) with 39.5mm cases and the calibre 6R55 movement. The company also prepared a limited-edition Astron chronograph featuring GPS synchronization across 38 time zones.

H. Moser & Cie, in collaboration with Agenhor, released the Endeavour Flyback Chronograph Dual Time Date. This 42mm steel model features a turquoise dial and is powered by the hand-wound HMC 730 caliber, providing a 72-hour power reserve.

## Timeline

### 2026-09-07: H. Moser & Cie and Zenith unveil new luxury watch models

Luxury watchmakers H. Moser & Cie and Zenith have unveiled new models, including the Endeavour Flyback Chronograph Dual Time Date and the Chronomaster Solo Sport.

2 sources. https://clstr.news/cluster/h-moser-cie-and-zenith-unveil-new-luxury-watch-models

### 2026-09-04: Seiko and Zenith announce new luxury watch collections

Seiko expands its Prospex Speedtimer line and announces a new GPS solar Astron chronograph, while Zenith introduces the Chronomaster Solo Sport featuring the El Primero 3620 movement.

6 sources. https://clstr.news/cluster/seiko-and-zenith-announce-new-luxury-watch-collections

### 2026-09-01: Zenith and Citizen announce new luxury and commemorative watch collections

Zenith introduces the Chronomaster Solo Sport three-hand watch, while Citizen celebrates 50 years of Eco-Drive with two limited edition Citizen Promaster models.

6 sources. https://clstr.news/cluster/zenith-and-citizen-announce-new-luxury-and-commemorative-watch-collections

### 2026-08-24: Longines refreshes Master Collection with new Chrono Monopoussoir

Longines refreshes its Master Collection with the new Chrono Monopoussoir, a single-pusher chronograph that blends historical aviation heritage with modern Swiss watchmaking elegance.

2 sources. https://clstr.news/cluster/longines-refreshes-master-collection-with-new-chrono-monopoussoir

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Cite as: Luxury watchmaker product releases and technical updates. CLSTR, https://clstr.news/situations/luxury-watchmaker-product-releases-and-technical-updates