The line-up
- 1
Seiko SBDX001 Marinemaster 300
10/10 · Unreal scenarioNo Diashield, a flawless lacquered bezel, the shrouded and protected loom pip, an unsigned crown and thicker hand-applied indices: it's just cleaner, even after 14 years in a box left the bezel a bit stiff.
- 2
Seiko SLA023 Marinemaster 300
9/10 · Beyond thunderdome · Gethin's ownIt's my watch and I do love it, but the laser-etched crown, the busy dial text and that unprotected painted triangle make me hate it, even if the bezel action and the loom are better.
In his words
"The pip of doom, which we all want to see."
▶ Play from 04:11"Look upon the dial. This is the point of the video."
▶ Play from 05:18"It would be this one all day long, every single day."
▶ Play from 09:04"Brighter but not whiter."
▶ Play from 09:51More line-ups
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Strap test12:37
Uncle Straps Beads Of Rice. Seiko Marinemaster 300 SBDX001 Review
The only aftermarket Marine Master bracelet I'll ever approve, on a factory-fresh SBDX001
2 watches · 2026-04-18 · 1,426 views
Round-up18:39
The tiers of Seiko
The tiers of Seiko: from the SKX up to the MM300, one rung at a time
8 watches · 2026-02-14 · 2,250 views
Round-up10:50
Seiko Marinemaster Bonanza Life. SLA019, SLA047, SLA021, SLA023
Marinemaster bonanza life: SLA019, SLA047, SLA021 and SLA023
4 watches · 2025-12-27 · 3,574 views
Head to head15:12
Seiko SLA025 VS SLA023
SLA025 vs SLA023: two of the best Seikos ever, and one is beyond Thunderdome
2 watches · 2025-05-24 · 1,610 views