Pre-Owned Seiko Marine Master Professional 300M – SBDX001 (8L35) A Iconic Seiko Diver – Good/Fair Condition
Up for sale is my Seiko Marine Master Professional 300M (SBDX001), a standout piece that has been part of my collection for several years. It’s a watch I’ve genuinely enjoyed owning—bold presence, iconic design, and one of Seiko’s most respected professional divers. I’m moving my collection in a different direction, and this one simply isn’t getting the wrist time it deserves.
The watch has not been serviced, but it continues to keep fantastic time. It comes on the original stainless steel bracelet and includes the manual, papers and Seiko Prospex box.
US Shipping Only PayPal Only Price: $1950 USD
Condition Keeps excellent time
Light, honest wear consistent with careful use
Crystal clean
Bracelet and clasp in strong condition with a few light scratches.
Includes Prospex box + manual
Why This Model Matters The SBDX001 is one of Seiko’s most sought‑after professional divers. It features the premium 8L35 movement, built at the Shizuku‑ishi Watch Studio—the same facility responsible for Grand Seiko mechanical calibers. It’s a true tool watch with serious pedigree.
Specifications Model: Seiko Marine Master Professional 300M – SBDX001