44 mm and up case

His favourite watch ever: a mesmerising Zaratsu case and Hi-Beat sweep, Seiko magic incarnate, but it scratches if you look at it and has no bracelet.

A huge, goofy and gorgeous Sumo: casework that beats Rolex and Omega, great comfort, only for big wrists. A real favourite.

His grail Marinemaster and favourite of the lot: he prefers it to the newer generation and to the SLA047.

Seiko's pinnacle in Gethin's eyes: flawless titanium finishing, a sublime bezel and a fantastic bracelet, all of it unreal.

Gethin's grail: the original Marinemaster 300, which he would take over the SLA023 'all day long'.

The faithful original: top finishing and the best bezel feel of the pair, but the X on the dial and the metal strap keeper annoy him.

The most legible watch he's ever seen: invisible crystal, Lego hands and near-unscratchable submarine steel. Bezel and clasp grated at first, but it went on to become his favourite watch, level with his SLA023.

His favourite watch case ever on a British-racing-green dial, with buttery bezel action, his favourite handset and mental lume. He can't choose between it and his SLA023, and only the painted triangle worries him.

A Turtle he really loves for comfort, let down by a stock rubber strap and a lume sliver he wants gone.

His grail and favourite Marinemaster: an unmatched Zaratsu case, the best bezel action and handset he's ever known and Christmas-tree lume. The Prospex X, the painted triangle and the unregulated movement are the only things stopping it being perfect.

A 50-quid, 200 m quartz beater with the Marlin on the dial: an absolute no-brainer, nothing better at the price, but the lume is very disappointing.

Light as a feather, gorgeous titanium case and one of the comfiest watches he's worn, let down by a skewed chapter ring, a stamped clasp and a fast 6R35. Buy used, not new.

A strange and wonderful big Mako with a fully lumed cream dial that annihilates the competition at night, let down by a pipless bezel and hollow end links.

Gethin isn't sure about it: a cheap 1970s-style reissue with a pointless 24-hour sub-dial and a stamped bracelet.

Not handsome, not pretty, not particularly well made, a bit expensive, but stoic and charming, and Gethin loves it.

Big but wearable, with a show-stealing waffle dial and a pure-pleasure ceramic bezel. Gethin would wear it proudly, just lose the Cyclops.

Gethin never liked the Tuna until they wore one: a huge watch that wears like a 42, with lume brighter than a Marinemaster and a quartz movement that's 'far from cheap'. The bezel is mushy and there's no bracelet.

A rugged, hefty, proper ISO diver that works perfectly well, but a mushy bezel and a misaligned lume pip make it not Gethin's cup of tea.

Doxa's biggest, heaviest brute and the one Gethin would keep: one of the best bezels at any price, a sublime bracelet and a smooth movement, let down by weight, crap lume, screwed 21 mm lugs and a pip that's always slightly off.

Quite good: a superb, saluted bezel and vintage dive looks for under £100 used, dragged down by a wobbly crown, a pipless bezel and a fast-running movement.

Orient's best ever watch, a bargain and a beast, but only for big wrists.

Stunning manta-ray ocean dial and a night-and-day bezel upgrade, let down by the bracelet, the Cyclops and misalignment. Not really for him, but he appreciates the appeal.