This replica Seamaster 210204 pairs a two-tone case with the chronograph complication that defines the top tier of the Diver 300M lineup. The 210.20.44.51.01.001 reference sits at 44mm, making it the largest current Seamaster Diver variant. Unlike the standard time-only 42mm models, this chronograph version packs three subdials and a date window into a wave-pattern dial without sacrificing legibility. The two-tone construction mixes steel with sedna gold accents on the bezel, crown, pushers, and bracelet center links.

Build Details

• Case diameter: 44mm
• Case material: steel and sedna gold two-tone
• Bezel: ceramic with sedna gold diving scale
• Crystal: domed sapphire with anti-reflective coating
• Dial: black with wave pattern, three chronograph subdials
• Bracelet: steel and sedna gold center links
• Functions: chronograph, date, 60-minute and 12-hour counters

The sedna gold alloy resists fading better than standard rose gold, and on this reference it appears across enough surfaces to read as a genuine two-tone piece rather than an accent detail.

What Collectors Notice

Chronograph Seamasters sit in an unusual position. They carry the Diver 300M DNA but push into territory usually occupied by the Speedmaster. The additional pushers at 2 and 4 o’clock change the case profile significantly, and the subdial layout at 3, 6, and 9 gives the dial a busier, more technical feel. Within the Seamaster lineup, this chronograph variant appeals to buyers who want a sport-dive watch with timing capability built in. Compare it with the standard Diver 300M to see how much the chronograph module changes the overall character.

This vs Other Versions

The two-tone chronograph occupies a niche between the full-steel chronograph and the precious-metal variants. It delivers the warmth of gold without the weight or formality of a solid-gold case. At 44mm, wrist presence is substantial, so this is not a watch that disappears under a shirt cuff. It works best on larger wrists where the lug-to-lug span sits comfortably. This replica Seamaster 210204 remains one of the more distinctive entries in the current Diver 300M catalog.