The Omega Seamaster 300 Master Co-Axial has a design inspired by Omega's first dive watch, while it is technically fully up-to-date and packed with Omega's latest inventions and materials, like an in-house, anti-magnetic Master Co-Axial movement and a ceramic bezel insert.Ref. 233.60.41.21.01.002 was introduced in 2015. This version of the vintage-inspired Seamaster 300 has a case and bracelet both in yellow gold.