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A display case (also called a showcase, display cabinet, shadow box, or vitrine) is a cabinet with one or often more transparent tempered glass (or plastic, normally acrylic for strength) surfaces, used to display objects for viewing. A display case may appear in an exhibition, museum, retail store, restaurant, or house. Often, labels are ...
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 ...
A case for a pocket watch, 1870. The outer clamshell protects the watch. The inner layer contains a glass window. The ring is for the attachment of a chain. A usually metal clamshell case for a mechanical watch, [1] common until the early twentieth century. It is meant to sit around the inner case of the watch. [2]
"Grid-domes", using a structural grid of roughly orthogonal members adjusted to create a double-curved surface, were employed in 1989 to create a double-glazed glass dome over an indoor swimming pool in Neckarsulm, Germany, and a single-glazed glass dome over the courtyard of the Museum for Hamburg History in Hamburg, Germany. [123]
It is also possible for quartz clocks and watches to have their quartz crystal oscillate at a higher frequency than 32 768 (= 2 15) Hz (high frequency quartz movements [4]) and/or generate digital pulses more than once per second, to drive a stepping motor powered second hand at a higher power of 2 than once every second, [5] but the electric ...
Universal pieces made to fit a range of ear sizes. Can easily be replaced. Allow more natural hearing. Dome tips are generic pieces that help your hearing aid attach to your ear.