MING · 37.09 Bluefin
The model in detail
Meet the watch
The sapphire dial itself rotates in the MING 37.09 Bluefin: the elapsed-minute scale sits beneath the crystal, with no familiar toothed ring outside. The diver therefore looks more like a compact piece of industrial design than a miniature instrument from a boat. That is the logic I like: MING’s characteristic fine lines and open space are not sacrificed to function. Buyers must nevertheless decide whether reading elapsed minutes from this graphic arrangement suits them better than a familiar contrasting bezel insert.
A separate crown at four o’clock turns the scale. The mechanism has 60 indexed positions and moves in only one direction. According to the manufacturer’s instructions, this sealed crown can be turned underwater: it neither pulls out nor screws down. The time-setting crown at two works differently; a red marking on its tube warns that it has not been screwed down. This division of duties makes sense, but the two should not be confused. Permission to operate the timing scale underwater does not mean that the movement crown may also be opened there.
The hour markers sit on the inside of the upper crystal, so they remain stationary as the sapphire disc below rotates. The luminous pattern occupies several levels, using Super-LumiNova X1. Official photographs show this particularly clearly in the dark: the result is almost a framework made of light. Something else matters in daylight: minimalist markings demand attention to the shape and position of the strokes. Impressive illumination does not by itself prove instant legibility in every situation, so I would judge the Bluefin primarily by how naturally its owner can read the time.
The official night photograph shows the luminous hands and markings on different levels.
© Horologer MING · SourceDetails and limitations
The steel case measures 38 mm in diameter, 12.8 mm thick and 44.5 mm from one lug tip to the other. Those are attractive proportions for someone who finds most expressive divers too large. A small diameter does not, however, make the Bluefin a flat watch: its domed front crystal contributes visibly to the silhouette. Examining the profile and how the strap sits is more useful than declaring the model perfect for every slender wrist in advance. Rated water resistance is 600 m. The engineering margin is impressive, but in everyday life it matters more that achieving it did not require an enormous case.
Inside is the automatic Sellita for MING SW300.M1, with approximately 50 hours of power reserve. Skeletonised bridges and a rotor with anthracite finishing are visible through the display back. The movement supports stopping the seconds hand when setting the time. The priorities deserve an honest description: the Bluefin’s individuality lies principally in its case and display, rather than a claim to an entirely new base calibre. Fifty hours suits daily wear, but a full weekend from Friday evening to Monday usually lasts longer: after such a break, the time may need resetting.
The rotating sapphire dial on the left; the display back revealing the SW300.M1 on the right.
© Horologer MING · SourceThe moulded FKM rubber strap is 20 mm wide, with curved quick-release spring bars and a micro-adjustable tuck buckle. Its loose end slips underneath the strap rather than being held by conventional external keepers. This neatly continues the watch’s clean silhouette. The pre-formed curve deserves attention too: the strap has a shape of its own from the outset, and its match with the wrist determines the result. An attractive technical description cannot replace a fitting, especially if you normally prefer a loose fit or frequently move a watch from one wrist to the other.
For regular sea swimming and diving, the condition of the seals matters more than the largest number on the caseback. MING recommends annual water-resistance checks for frequent sea swimmers or divers; its general movement-service guideline is five to seven years. A previously owned example should therefore be chosen with an understanding of its latest checks, not merely the cleanliness of its polishing. The familiar Sellita base is also no reason to regard the entire Bluefin as an ordinary watch for any workshop: its internal rotating assembly and proprietary case components deserve separate attention.
The Bluefin was introduced on 23 May 2024 and won the Sports Watch Prize at GPHG 2024. The official archive now states that it is sold out, deliveries are complete and it will not be produced again. That matters more than an old launch price: this review does not promise availability from the brand. To me, the model’s strength is its ability to offer a recognisable alternative to the conventional diver without abandoning compact dimensions. The trade-off is clear too: its original architecture asks you to accept an unfamiliar way of timing minutes and a more attentive approach to buying an already-produced example.
