The Omega co-axial 8500 series of calibres was released in 2007, a milestone in the history of the Omega brand.
The calibre 8500 is the base calibre for a family of movements that have been released progressively over the past two years and will culminate in the unveiling of the 14 ligne chronograph series. Individual calibres serve the following functions:
Annual Calendar, Calibre 8601 and 8611
Day/Date, Calibre 8602 and 8612
Big Date, Calibre 8603 and 8613
Power Reserve/Small Seconds, Calibre 8604 and 8614
GMT, Calibre 8605 and 8615
14 lignes Chronographs, calibre 9300 and 9301
This collection of in-house calibres exclusively dedicated to Omega watches digs deep into Omega's DNA and brings Omega full cycle in a process of rehabillitation and restoration to its former glory days.
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For an excellent review of the co-axial movement by British scientific horologist, Philip Woodward, please click here