Seiko 5 Sports GMT SSK001 vs Christopher Ward C63 Sealander GMT

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

Last verified 2026-06-11 · specs from manufacturer data · tier = price band, confirm the live price at the retailer

Spec	Seiko 5 Sports GMT SSK001	Christopher Ward C63 Sealander GMT
Movement	Automatic	Automatic
Water resistance	100m	150m
Case size	42.5mm	39mm
Crystal	hardlex	sapphire
Style	GMT / travel	GMT / travel
Price tier	Mid	Upper

Which should you buy?

• the Christopher Ward C63 Sealander GMT takes more water (150m) — the one to pick if you actually swim or dive
• the Christopher Ward C63 Sealander GMT has a sapphire crystal — more scratch-resistant for daily wear
• the Seiko 5 Sports GMT SSK001 wears 42.5mm vs the Christopher Ward C63 Sealander GMT's 39mm — choose by wrist size
• the Seiko 5 Sports GMT SSK001 sits in the lower price tier (Mid) if budget leads

Where to buy

Check the Seiko 5 Sports GMT SSK001 price on Amazon →

Check the Christopher Ward C63 Sealander GMT price on Amazon →

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FAQ

What's the difference between the Seiko 5 Sports GMT SSK001 and the Christopher Ward C63 Sealander GMT?
Both are gmt / travel watches. The Seiko 5 Sports GMT SSK001 is automatic, 100m water resistance, 42.5mm, hardlex crystal; the Christopher Ward C63 Sealander GMT is automatic, 150m water resistance, 39mm, sapphire crystal.

Which has better water resistance, the Seiko 5 Sports GMT SSK001 or the Christopher Ward C63 Sealander GMT?
The Christopher Ward C63 Sealander GMT, rated 150m, versus 100m on the other. Pick 100m or higher for swimming and 200m+ for diving.

Which is better value, the Seiko 5 Sports GMT SSK001 or the Christopher Ward C63 Sealander GMT?
The Seiko 5 Sports GMT SSK001 is the lower-priced tier; the other steps up in build for more money — confirm both live prices at the retailer.

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