GMT / travel watches

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A second time-zone hand for travelers. We list 9 GMT watches. All 9 are automatic. All 9 are rated 100m or more, the usual line for swimming. 8 have a sapphire crystal. Cases run from 39mm to 44mm.

Last verified 2026-06-27 · 9 models

Watch	Movement	WR	Case	Crystal	Style	Tier	Buy
Seiko 5 Sports GMT SSK001	Automatic	100m	42.5mm	hardlex	GMT / travel	Mid	See price on AmazonCheck price
San Martin SN0123 GMT	Automatic	200m	39mm	sapphire	GMT / travel	Mid	Check priceCheck price
Baltic Aquascaphe GMT	Automatic	100m	39mm	sapphire	GMT / travel	Upper	Check priceCheck price
Christopher Ward C63 Sealander GMT	Automatic	150m	39mm	sapphire	GMT / travel	Upper	Check priceCheck price
Mido Ocean Star GMT	Automatic	200m	44mm	sapphire	GMT / travel	Upper	Check priceCheck price
Christopher Ward C65 Trident GMT	Automatic	150m	41mm	sapphire	GMT / travel	Upper	Check priceCheck price
Rolex GMT-Master II	Automatic	100m	40mm	sapphire	GMT / travel	Premium	Check priceCheck price
Tudor Black Bay GMT	Automatic	200m	41mm	sapphire	GMT / travel	Premium	See price on AmazonCheck price
Longines Spirit Zulu Time	Automatic	100m	42mm	sapphire	GMT / travel	Premium	See price on AmazonCheck price

Quick answers

Which GMT watches have a sapphire crystal?

8 of the 9: San Martin SN0123 GMT, Baltic Aquascaphe GMT, Christopher Ward C63 Sealander GMT, Mido Ocean Star GMT, Christopher Ward C65 Trident GMT, Rolex GMT-Master II, Tudor Black Bay GMT and Longines Spirit Zulu Time. Sapphire resists scratches better than mineral or acrylic. How the crystals compare.

Can you swim with GMT watches?

All 9 are rated 100m or more, the usual line for regular swimming. 3 of those reach 200m or more. What the ratings mean.

Are there automatic or hand-wound GMT watches?

Yes — all 9 are automatic. Automatic vs quartz.

What is the smallest of the GMT watches?

The smallest are the San Martin SN0123 GMT, Baltic Aquascaphe GMT and Christopher Ward C63 Sealander GMT, at 39mm. The largest is the Mido Ocean Star GMT, at 44mm. What size fits your wrist.

Head-to-head comparisons

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