Casio Edifice EFV-540 vs Seiko Prospex Speedtimer Solar SSC813

Both are chronograph watches — here's how the specs differ and which to pick.

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

Spec	Casio Edifice EFV-540	Seiko Prospex Speedtimer Solar SSC813
Movement	Quartz	Solar / light-powered
Water resistance	100m	100m
Case size	44mm	39mm
Crystal	mineral	sapphire
Style	Chronograph	Chronograph
Price tier	Entry	Mid

Which should you buy?

their movements differ — Casio Edifice EFV-540: quartz, Seiko Prospex Speedtimer Solar SSC813: solar / light-powered
the Seiko Prospex Speedtimer Solar SSC813 has a sapphire crystal — more scratch-resistant for daily wear
the Casio Edifice EFV-540 wears 44mm vs the Seiko Prospex Speedtimer Solar SSC813's 39mm — choose by wrist size
the Casio Edifice EFV-540 sits in the lower price tier (Entry) if budget leads

Where to buy

Check the Casio Edifice EFV-540 price on Amazon →

Check the Seiko Prospex Speedtimer Solar SSC813 price on Amazon →

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which watches we compare.

⌚ Ordering a watch? Amazon Prime's free 30-day trial includes free fast delivery and free returns — handy when sizing is a gamble. Start the free 30-day trial →

Affiliate link — we may earn a commission on qualifying sign-ups, at no extra cost to you. Current terms are on Amazon's page.

Neither of these quite right? Answer five questions — wrist size, what it's for, battery or automatic, whether it gets wet, budget — and see which of the 128 watches actually fit →

FAQ

What's the difference between the Casio Edifice EFV-540 and the Seiko Prospex Speedtimer Solar SSC813?
Both are chronograph watches. The Casio Edifice EFV-540 is quartz, 100m water resistance, 44mm, mineral crystal; the Seiko Prospex Speedtimer Solar SSC813 is solar / light-powered, 100m water resistance, 39mm, sapphire crystal.

Which is better value, the Casio Edifice EFV-540 or the Seiko Prospex Speedtimer Solar SSC813?
The Casio Edifice EFV-540 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:

More chronograph comparisons: Dan Henry 1963 vs Bulova Surveyor Chronograph · Hamilton Intra-Matic Auto Chronograph vs Tag Heuer Carrera Chronograph · Bulova Lunar Pilot vs Seiko Prospex Speedtimer Solar SSC813 · Bulova Lunar Pilot vs Dan Henry 1963 · all chronograph watches · all comparisons