The 233.30.41.21.01.001 reference makes this replica Seamaster 233304 one of the more classically styled entries in the Seamaster Planet Ocean family. A black dial with applied hour markers sits inside a 41mm steel case, keeping proportions balanced between sport and dress. The ceramic bezel ring rotates unidirectionally with a luminous dot at 12, and the overall package carries the tool-watch DNA that Omega built into every modern Planet Ocean without the bulk of larger references.

Technical Overview

• Case diameter: 41mm
• Case material: stainless steel
• Bezel: black ceramic unidirectional
• Dial: black with luminous applied indices
• Crystal: sapphire with AR coating
• Bracelet: stainless steel with folding clasp
• Water resistance rating: 600 meters
• Functions: hours, minutes, seconds, date

The Planet Ocean series has always carried higher depth ratings than the standard Diver 300M, and this 600-meter specification reflects that heritage. The case construction uses a screw-in caseback and helium escape valve to support those numbers.

Inside the Movement

At 41mm the 233.30 sits comfortably on most wrist sizes, making it the go-to Planet Ocean for people who find the 43.5mm version too large. The black dial keeps legibility straightforward with a date window at 3 o’clock and broad arrow-style hands. Compared to the Seamaster 215924 reference, this model trades size for daily wearability. Both live within the Seamaster collection, but serve different wrist sizes and style preferences.

What Sets It Apart

Black-dial Seamaster references outnumber any other dial color in the lineup, yet the 233.30 distinguishes itself through proportions. The 41mm case with 600m depth rating occupies a niche between the dress-oriented Aqua Terra and the oversized Planet Ocean chronographs. For daily rotation, it works equally well under a shirt cuff or over a wetsuit. This replica Seamaster 233304 captures that crossover versatility in a package that does not demand attention but earns it through execution.