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Seiko Prospex Speedtimer SSC817P1

The Seiko Prospex Speedtimer SSC817P1 brings together Seiko’s historic Speedtimer design language and modern solar-powered chronograph technology. The Speedtimer collection draws inspiration from Seiko’s sports-timing watches of the 1960s and 1970s, while contemporary models incorporate updated materials, movements, and finishing.

The SSC817P1 is particularly appealing to enthusiasts who want a functional chronograph with a sporty profile, practical solar movement, and recognizable Seiko Prospex styling.

V192 Solar Movement

At the heart of the Seiko Prospex Speedtimer SSC817P1 is the V192 solar movement. Seiko specifies an accuracy of approximately ±15 seconds per month and an operating time of approximately six months when fully charged.

The movement includes an overcharge-prevention function and provides several useful indications, including a 24-hour hand, small seconds, power-reserve indicator, and date display.

60-Minute Chronograph

The V192 movement provides a chronograph capable of measuring up to 60 minutes in 1/5-second increments. This makes the SSC817P1 more than a conventional time-only sports watch and reinforces its connection to Seiko’s Speedtimer timing heritage.

The chronograph layout also contributes to the watch’s technical and motorsport-inspired appearance.

39mm Stainless-Steel Case

The Seiko Prospex Speedtimer SSC817P1 features a stainless-steel case measuring 39.0 mm in diameter and 13.3 mm in thickness. Seiko lists a lug-to-lug measurement of 45.5 mm and a 20 mm distance between the lugs.

The compact 39 mm diameter gives the Speedtimer a balanced presence on the wrist while retaining the sporty proportions expected from a chronograph.

Curved Sapphire Crystal

Seiko equips the SSC817P1 with a curved sapphire crystal featuring an anti-reflective coating on the inner surface.

Sapphire crystal provides strong scratch resistance and is well suited to a sports-oriented watch intended for regular wear. The curved profile also contributes to the modern interpretation of the Speedtimer’s vintage-inspired case design.

Tachymeter Function

The watch features a tachymeter function, reinforcing its connection to chronograph and speed-timing watches.

The tachymeter scale provides a classic motorsport-inspired detail while complementing the chronograph layout and sporty Prospex character.

10-Bar Water Resistance

The Seiko Prospex Speedtimer SSC817P1 is rated to 10 bar water resistance. Seiko also specifies a screw case back, making the watch suitable for everyday sporting and active use within its stated water-resistance limitations.

Speedtimer Heritage

The Speedtimer name has an important place in Seiko’s chronograph history. Seiko introduced its original Speedtimer in 1969, and the current solar chronograph collection carries forward design elements from that era.

Seiko describes its modern solar Speedtimer watches as inheriting the iconic designs and styles of Speedtimer watches from the 1960s and 1970s.

Key Features

• Seiko Prospex Speedtimer SSC817P1
• V192 solar movement
• Solar-powered chronograph
• 60-minute chronograph
• 1/5-second chronograph measurement
• 24-hour hand
• Small seconds hand
• Date display
• Power-reserve indicator
• Overcharge prevention function
• Tachymeter function
• Stainless-steel case
• 39.0 mm case diameter
• Curved sapphire crystal
• Inner anti-reflective coating
• LumiBrite on hands and indexes
• Three-fold clasp with push-button release
• 10-bar water resistance
• Screw case back