Tudor Black Bay 58, Navy vs Tudor Black Bay GMT

Side-by-side at a glance. Click a watch above to open the full reference page.

	Tudor 79030N	Tudor M79830RB-0001
Model	Black Bay 58, Navy	Black Bay GMT
Caliber	Tudor MT5402 -- in-house automatic, 28,800bph, 70h PR, 26j; METAS-certified, bidirectional winding, free-sprung hairspring	Tudor MT5652 -- in-house automatic GMT, 28,800bph, 70h PR, 26j; METAS-certified, bidirectional winding; used in Black Bay GMT
Case size	39mm	41mm
Lug-to-lug	44.6mm	47mm
Years produced	2018–present	2018–present
Brand tier	luxury	luxury
Era	modern	modern
Movement tier	Unclassified movement	Unclassified movement
Market median (excellent / full-set)	n/a	n/a
Typical range	n/a	n/a
Confidence	low	low
Categories	dive, sport	gmt-worldtime, sport, dive
Editorial	yes	yes
Typical price (2026)	$2,800 – $3,800	$3,200 – $4,500
Service	Every 8 years · $600 – $900	n/a
Collector note	best value: At 39mm with an in-house movement and METAS certification, this is widely cited as the strongest value proposition in the sub-$4,000 dive watch market.	most sought: The Black Bay GMT with its bi-directional 24-hour bezel is the most functional Tudor and the strongest secondary market performer in the Black Bay family outside the BB58.