Seiko Prospex Speedtimer Solar SSC813 vs Tissot Seastar 1000 Chronograph

Both are chronograph watches. In short: the Tissot Seastar 1000 Chronograph takes more water (300m) — both are fine for swimming, but it has more margin if you dive. The Seiko Prospex Speedtimer Solar SSC813 is solar / light-powered, 100m water resistance, 39mm, sapphire crystal; the Tissot Seastar 1000 Chronograph is quartz, 300m water resistance, 45.5mm, sapphire crystal.

Specs last verified 2026-06-27 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

Spec	Seiko Prospex Speedtimer Solar SSC813	Tissot Seastar 1000 Chronograph
Movement	Solar / light-powered	Quartz
Water resistance	100m	300m
Case size	39mm	45.5mm
Crystal	sapphire	sapphire
Style	Chronograph	Chronograph
Price tier	Mid	Upper

Which should you buy?

Their movements differ — Seiko Prospex Speedtimer Solar SSC813: solar / light-powered, Tissot Seastar 1000 Chronograph: quartz
The Tissot Seastar 1000 Chronograph takes more water (300m) — both are fine for swimming, but it has more margin if you dive
The Seiko Prospex Speedtimer Solar SSC813 wears 39mm vs the Tissot Seastar 1000 Chronograph's 45.5mm — choose by wrist size
The Seiko Prospex Speedtimer Solar SSC813 sits in the lower price tier (Mid) if budget leads

Where to buy

Seiko Prospex Speedtimer Solar SSC813See price on AmazonCheck price

Tissot Seastar 1000 ChronographSee price on AmazonCheck price

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FAQ

What's the difference between the Seiko Prospex Speedtimer Solar SSC813 and the Tissot Seastar 1000 Chronograph?
Both are chronograph watches. The Seiko Prospex Speedtimer Solar SSC813 is solar / light-powered, 100m water resistance, 39mm, sapphire crystal; the Tissot Seastar 1000 Chronograph is quartz, 300m water resistance, 45.5mm, sapphire crystal.

Which has better water resistance, the Seiko Prospex Speedtimer Solar SSC813 or the Tissot Seastar 1000 Chronograph?
The Tissot Seastar 1000 Chronograph, rated 300m, versus 100m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Seiko Prospex Speedtimer Solar SSC813 or the Tissot Seastar 1000 Chronograph?
The Seiko Prospex Speedtimer Solar SSC813 is the lower-priced tier; the other steps up in build for more money — confirm both live prices at the retailer.

Citing these specs? Go ahead — manufacturer data, last verified 2026-06-27. Copy a ready-made reference:

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