Seiko Prospex Marinemaster 300M Automatic

Why We Love It

By now, our love for Seiko (new and old) should be apparent. 

From the rare as hen's teeth Hi Beat 6159 to the film-famous 6105 and 6309 models to the economy workhorse SKX007, Japanese watchmakers perfected incredibly well-made tool watches decades ago- and at prices that make the most diehard Swiss watch fans bristle with jealousy.

An update to the Seiko MM300, the SBDX017 was extremely popular while Seiko was producing it. Once it was discontinued, the Seiko community cried out in pain. While Seiko produced a couple limited edition versions in the aftermath, theres just no substitution for the down-to-business original. With its 44mm monocoque case, oversized 'Lumibrite' luminous indicies and and handset, and crisp timing bezel, it is as beautiful (and hefty) as it is functional. The groundbreaking 'DiaSheild' coating which Seiko applied to these models improved its resistance to scratching and corrosion - probably the reason this particular example looks almost unworn. 

At the end of the day, great watch making is great watch making, whether made in Switzerland, Germany, or Japan. As badass as it is reliable, the SBDX017 Marinemaster is a modern classic diver through and through.

The Story

For over 135 years, Seiko has been cranking out innovative and impeccably engineered watches at every price point, from entry level Seiko 5s to world-class high horology pieces under the Grand Seiko brand. Underpinning Seiko's efforts has been the mass production of reliable and accurate movements capable of being paired with a wide array of case and dial configurations. 

Seiko is the piece we always go to when we go out into the field. Whether we're wearing it while hoofing it up a mountain, trudging through the wetlands in search of winged dinner, fishing for brownies or bonefish, or just getting it sandy at the beach, this piece serves a very important role as a timepiece that can take a beating while also giving us watch snobs something to wear that we can be truly proud of.

Our Pledge

Analog:Shift stands behind the authenticity of our products in perpetuity.

Condition

Since our pieces are vintage or pre-owned, please expect wear & patina from usage and age. Please read each item description and examine all product images.

Warranty

We back each Analog:Shift vintage timepiece with a one-year mechanical warranty from the date of purchase.

International Buyers

Please contact us prior to purchase for additional details on shipping and payment options.

All of our watches include complementary insured shipping within the 50 states.

Most of our products are on hand and will ship directly from our headquarters in New York City. In some cases, watches will be shipped directly from one of our authorized partners.

We generally ship our products via FedEx, fully insured, within 5 business days of purchase. An adult signature is required for receipt of all packages for insurance purposes. Expedited shipping is available at an additional cost. We are also happy to hand deliver your purchase in Manhattan or you may pick it up at our showroom.

Returns must be sent overnight or by priority international delivery, fully insured and paid for by the customer. A restocking fee may apply. Watches must be returned in the same condition as initially shipped.

We welcome international buyers, please contact us prior to purchase for additional details on shipping and payment options.