Tudor Black Bay GMT vs Mido Ocean Star GMT

Both are GMT watches. In short: the Tudor Black Bay GMT wears 41mm vs the Mido Ocean Star GMT's 44mm — choose by wrist size. The Tudor Black Bay GMT is automatic, 200m water resistance, 41mm, sapphire crystal; the Mido Ocean Star GMT is automatic, 200m water resistance, 44mm, sapphire crystal.

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

Spec	Tudor Black Bay GMT	Mido Ocean Star GMT
Movement	Automatic	Automatic
Water resistance	200m	200m
Case size	41mm	44mm
Crystal	sapphire	sapphire
Style	GMT / travel	GMT / travel
Price tier	Premium	Upper

Which should you buy?

The Tudor Black Bay GMT wears 41mm vs the Mido Ocean Star GMT's 44mm — choose by wrist size
The Mido Ocean Star GMT sits in the lower price tier (Upper) if budget leads

Where to buy

Tudor Black Bay GMTSee price on AmazonCheck price

Mido Ocean Star GMTSee price on AmazonCheck price

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 includes fast delivery on eligible items, and eligible new members may be offered a free trial. Delivery speed and return terms vary by item, so check the listing when sizing is a gamble. See if you can try Prime free →

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 Tudor Black Bay GMT and the Mido Ocean Star GMT?
Both are GMT watches. The Tudor Black Bay GMT is automatic, 200m water resistance, 41mm, sapphire crystal; the Mido Ocean Star GMT is automatic, 200m water resistance, 44mm, sapphire crystal.

Which is better value, the Tudor Black Bay GMT or the Mido Ocean Star GMT?
The Mido Ocean Star GMT 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 GMT comparisons: Baltic Aquascaphe GMT vs Christopher Ward C63 Sealander GMT · Baltic Aquascaphe GMT vs Christopher Ward C65 Trident GMT · Rolex GMT-Master II vs Tudor Black Bay GMT · Rolex GMT-Master II vs Longines Spirit Zulu Time · all GMT watches · all comparisons