Following the debut of the redesigned Omega Seamaster Diver 300M dive watch collection last year, the Omega Seamaster 300M Chronograph has been refreshed for 2019.

There are nine new references that were introduced at the Swatch Group’s TimeToMove trade show last month. They all have the same dimensions and functions but vary in color and materials.

The Seamaster 300M Chronograph Professional line comes in a 44 mm diameter case, with a ceramic bezel insert, ceramic chronograph pushers, a ceramic dial with laser-engraved waves, prominent skeletonized sword-shaped hour and minutes hands, and large circular or rectangular applied indices.

The conical helium escape valve, located at 10 o’clock on the case flank, has the new generation aesthetic, like the Seamaster 300M watch we went hands-on with last year.

First in the lineup is the stainless steel Seamaster 300M Chronograph comes with a blue ceramic bezel insert, blue pushers, and a blue dial. This is the most accessible version and comes with rhodium-plated hands and indices. Omega’s Co-Axial Master Chronometer caliber 9900 powers the hours, minutes, small seconds, date, and chronograph functions. (This model also comes in a black version or a gray version, and is available on integrated rubber strap or bracelet).

Next is the two-tone stainless steel version which has a black bezel insert, black pushers, and black dial. This variation uses 18K red gold for the bezel, the bezel markings, the conical helium escape valve, the crown, the pusher guards, the hands, and indices. This is also powered by Omega caliber 9900. (This model also comes in a blue variation with yellow instead of red gold and is available with an integrated rubber strap or two-tone stainless steel bracelet.)

Finally, there is a solid 18K red gold version with a gold bezel, helium escape valve, crown, hands, pusher guards, subdial chapters rings, and indices. Additionally, instead of a shiny bezel insert and flush diving scale like the two aforementioned models, this has a unique laser-ablated black ceramic bezel ring with a granular textured matte finish contrasted by a black relief engraved polished diving scale. Going one step further, because this is the solid 18K gold version, instead of the caliber 9900, this Seamaster 300M Chronograph is driven by caliber 9901 which is essentially the same movement as the 9900 but with a more premium red gold oscillating weight and traversing balance bridge.

Retail prices start at $7,450.