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1939 advertisement from Jewelers' Circular Keystone magazine of the Gallet MultiChron 30 "Clamshell", the world's first water resistant chronograph wristwatch Reverse view of the Gallet Clamshell showing the 4 screws that compress the 2 part case around the flared acrylic crystal Open view of the Gallet Clamshell showing top part of the two part case and complex Swiss column wheel movement ...
It's no new news that fitness trackers these days are designed to get wet. Beyond just getting splashed while you wash your hands, these fitness-focused smartwatches can handle sweaty workouts ...
Promaster Dive. Citizen makes waterproof watches that won't break the bank and don't need any battery replacement because the brand's signature Eco-Drive tech can convert any light to energy.
Other requirements included a matte black dial with luminescent hands, numbers and indices, subsidiary seconds, a shatter-resistant perspex plastic crystal, a case resistant to water, dust and shock, a high-quality, isochronal and robust, 15 jewel movement, and a water-resistant winding crown of a good size. [1]
The case is the outer covering of the watch. The case back is the back portion of the watch's case. Accessing the movement (such as during battery replacement) depends on the type of case back, which are generally categorized into four types: Snap-off case backs (press-on case backs): the watch back pulls straight off and presses straight on.
They had the idea to place a seal in the crown of winder, which is screwed on the counterpart. "L'Impermeable" was born: it is the very first waterproof watch intended especially to protect the movement from dust and humidity. [1] This pocket watch is nowadays on display at the International Watchmaking Museum in La Chaux-de-Fonds.
Aquastar is a Swiss watch maker [1] [2] [3] founded in 1962 by Frédéric Robert, a watchmaker, scuba diver, and skipper. Frederic Robert was the son of the 5th generation watchmaker family that founded the brand Jean Richard in the late 1800s. Aquqstar has become known for its specialized instruments and wrist watches designed for professional ...
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to 980 ft), though modern technology ...
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