Seiko Prospex Samurai Black SRPB51 vs Seiko Prospex Speedtimer SSC813

In-Depth Comparison

The Seiko Prospex Samurai Black SRPB51 and the Seiko Prospex Speedtimer SSC813 represent two compelling options in the luxury watch market. Both timepieces have earned devoted followings among collectors and enthusiasts, but they approach horology from distinctly different perspectives. Let's break down how these two watches compare across the key dimensions that matter most to buyers.

Heritage And Brand Prestige

Seiko and Seiko is a brand that needs no introduction. Comparing two models from the same manufacturer comes down to purpose, design philosophy, and intended use case. Both watches hail from Japan, benefiting from the region's deep horological tradition. This particular Prospex reference was introduced in 2017, while this Prospex reference debuted in 2021. The Seiko Prospex Speedtimer SSC813 is the newer release, potentially featuring more modern technology and finishing.

Movement And Mechanics

At the heart of the Seiko Prospex Samurai Black SRPB51 beats the 4R35 caliber offering a 41-hour power reserve running at 21,600 vph with 23 jewels. The Seiko Prospex Speedtimer SSC813 is powered by the Seiko V192 with a 168-hour power reserve operating at 32,768 vph. The Seiko Prospex Speedtimer SSC813 wins on power reserve with a 127-hour advantage, which means less frequent winding for those who rotate watches.

Dimensions And Wearability

The Seiko Prospex Samurai Black SRPB51 features a 43.8mm case at 12.8mm thick with a 48.5mm lug-to-lug measurement, crafted in Stainless Steel. The Seiko Prospex Speedtimer SSC813 comes in at 39.0mm and 13.3mm thick with 46.0mm lug-to-lug, constructed from Stainless Steel. The Seiko Prospex Speedtimer SSC813 wears more compactly on the wrist, making it potentially more suitable for smaller wrists or those who prefer understated proportions. At 147g, the Seiko Prospex Speedtimer SSC813 is the lighter of the two.

Materials And Construction

The Seiko Prospex Samurai Black SRPB51 uses a Hardlex crystal paired with a Rotating bezel, while the Seiko Prospex Speedtimer SSC813 features Sapphire crystal with a Fixed tachymeter bezel. On the wrist, the Seiko Prospex Samurai Black SRPB51 comes on a Stainless Steel bracelet with Fold-over, while the Seiko Prospex Speedtimer SSC813 is fitted with Stainless steel bracelet featuring Three-fold clasp.

Water Resistance And Capability

The Seiko Prospex Samurai Black SRPB51 is rated to 200m / 656ft and the Seiko Prospex Speedtimer SSC813 to 100m / 328ft. For serious diving or water activities, the Seiko Prospex Samurai Black SRPB51 offers a meaningful advantage.

Pricing And Value

At retail, the Seiko Prospex Samurai Black SRPB51 lists for $475 compared to $400 for the Seiko Prospex Speedtimer SSC813. On the secondary market, the Seiko Prospex Samurai Black SRPB51 trades around $360 while the Seiko Prospex Speedtimer SSC813 commands approximately $350.

The Verdict

Choosing between the Seiko Prospex Samurai Black SRPB51 and the Seiko Prospex Speedtimer SSC813 ultimately comes down to personal priorities. For dress occasions and smaller wrists, the Seiko Prospex Speedtimer SSC813 is more versatile. Both watches are exceptional timepieces that will serve their owner well for generations. We recommend trying both on the wrist at an authorized dealer before making your final decision, as comfort and emotional connection are ultimately just as important as specifications.