Bulova Lunar Pilot vs Seiko Prospex Speedtimer Solar SSC813

Both are chronograph watches in the mid tier. In short: the Seiko Prospex Speedtimer Solar SSC813 takes more water (100m) — the one to pick if you swim. The Bulova Lunar Pilot is meca-quartz, 50m water resistance, 43.5mm, sapphire crystal; the Seiko Prospex Speedtimer Solar SSC813 is solar / light-powered, 100m water resistance, 39mm, sapphire crystal.

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

Spec	Bulova Lunar Pilot	Seiko Prospex Speedtimer Solar SSC813
Movement	Meca-quartz	Solar / light-powered
Water resistance	50m	100m
Case size	43.5mm	39mm
Crystal	sapphire	sapphire
Style	Chronograph	Chronograph
Price tier	Mid	Mid

Which should you buy?

Their movements differ — Bulova Lunar Pilot: meca-quartz, Seiko Prospex Speedtimer Solar SSC813: solar / light-powered
The Seiko Prospex Speedtimer Solar SSC813 takes more water (100m) — the one to pick if you swim
The Bulova Lunar Pilot wears 43.5mm vs the Seiko Prospex Speedtimer Solar SSC813's 39mm — choose by wrist size

Where to buy

Bulova Lunar PilotSee price on AmazonCheck price

Seiko Prospex Speedtimer Solar SSC813See price on AmazonCheck price

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FAQ

What's the difference between the Bulova Lunar Pilot and the Seiko Prospex Speedtimer Solar SSC813?
Both are chronograph watches in the mid tier. The Bulova Lunar Pilot is meca-quartz, 50m water resistance, 43.5mm, sapphire crystal; the Seiko Prospex Speedtimer Solar SSC813 is solar / light-powered, 100m water resistance, 39mm, sapphire crystal.

Which has better water resistance, the Bulova Lunar Pilot or the Seiko Prospex Speedtimer Solar SSC813?
The Seiko Prospex Speedtimer Solar SSC813, rated 100m, versus 50m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Bulova Lunar Pilot or the Seiko Prospex Speedtimer Solar SSC813?
Both sit in the mid tier, so it comes down to movement, water resistance and case size — see the spec table above.

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

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