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ProTek’s new diver glows for 25 years without you doing anything
Swiss Pro-Glo T100 tubes, a 45mm carbon composite case and 300 metres, for 575 US dollars.
Hen & Mills Editorial · 2 min read · 7 August 2026
Super-LumiNova needs light before it gives any back. Leave a watch in a drawer, pick it up at midnight, and it does nothing for you. Tritium tubes do not work that way. They are self-powered, they do not need charging, and ProTek quotes 25 years of continuous glow on the new Aggressor Series 4000.
The rating is Swiss Pro-Glo T100. That T100 is the part to note, because tritium brightness is graded and T100 is the brightest class in ordinary civilian use. ProTek puts it at roughly 100 times the output of conventional photoluminescent lume.
Four references, four dials
The watch around it costs 575 US dollars, discounted to 550 as we write. Four references, four dial colours: PT4001 black, PT4003 blue, PT4004 orange, PT4007 yellow.
The case is carbon composite at 45mm, with a 60-click unidirectional ratcheting bezel. Caseback and crown are both 316L steel and both screw in, the crown carrying multiple O-rings and matched to the dial colour. Water resistance is 300 metres, and ProTek says every watch is tested in air and in water, which is more than plenty of brands bother with.
The crystal is sapphire with anti-reflective coating. That surprised us at this price on a case this size, and it did not appear in the early write-ups.
Movement is the Citizen/Miyota 2035 quartz, three hands, four-year battery. The strap is rubber, 22mm tapering to 20, on a steel signature buckle with quick-release pins, and the blue, yellow and orange straps are sold separately. Eighty-two grams all in, which is light for a 45mm watch and entirely down to the composite.
A watch you can ignore for a decade
Forty-five millimetres will settle this for most wrists before any of the above gets a hearing. If it suits you, everything here points the same way: quartz, a four-year battery, and lume that keeps working for a quarter of a century. You could leave this in a drawer for a decade, pick it up in the dark, and still read it. Very few watches at any price can say that.
The four-year battery deserves a mention alongside the tubes. Between the two, the maintenance schedule for this watch is a battery change once a presidential term and nothing else. No winding, no charging, no regulation.
There is a trade-off and it is worth being straight about it. The Miyota 2035 is about as basic as a quartz movement gets. It keeps good time, it costs very little, and nobody has ever admired one. On a 575-dollar watch built around illumination and case material that is the correct place to spend nothing, but if you want something to look at through a caseback, this is not the watch.
ProTek sells the blue, yellow and orange straps separately, so the colour you order is not the colour you are stuck with.