New takes on legacy models, new movements, high complications, interesting gem-setting, stone dials, smaller case sizes, and ...

Pure quartz crystals have been spotted on Mars for the first time, as well as other gems like opal. Researchers say these crystals, as well as being evidence of past hydrothermal activity ...

Abstract: A 2.5-mc crystal unit has been developed for use in a new, extremely stable frequency standard oscillator. A well-balanced design was achieved by using a 30-mm-diameter, plano-convex, ...

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