Omega Seamaster 300M-Style 42mm Diver with Sapphire Crystal and a See-Through Caseback

Pros

• · 316 stainless steel case and bracelet with a folding clasp, per the listing.
• · Sapphire crystal at the front and a transparent caseback showing the movement, per the listing.
• · Diver hardware listed: unidirectional rotating bezel, screw-down crown, helium escape valve, luminous markers.
• · One side-by-side comparison source describes the overall finishing as good for its price tier.
• · Layout matches the fourth-generation Seamaster 300M: 42mm case, 6 o'clock date, wave-textured dial.

Cons

• · The same comparison reports the ceramic bezel insert has slightly less gloss and a finer finish than the original.
• · That comparison also notes a polishing gap on the steel bracelet relative to the original.

Fit notes

42mm case with a see-through caseback, so it sits tall. Reviewers of the Seamaster 300M say the thickness and flat case profile make it wear larger than 42mm suggests; check lug-to-lug or try one on before ordering.

Buy if

For a buyer who wants the Seamaster 300M look — wave-textured dial, 6 o'clock date, full diver hardware — and who will verify case and lug-to-lug dimensions with the seller before ordering.

Skip if

Skip it if you want independent owner reports on this exact SKU before buying, or if a 42mm case with a tall, flat profile wears too large on your wrist.