Post by cathlau on Jun 4, 2016 21:02:20 GMT 1
Pocket Watch Glass
Beveled edge crystal for open face pocketwatch . This is a great reason why you NEVER shut a hunter case watch with your big ol' thumb pressing right in the middle of the cover. As watches grew thinner, and as thinner watches became more stylish and popular, more attention was paid to a smoother transition between the crystal edge and the bezel. They have a flat spot ground into the center of the crystal which gives them a "bulls-eye" appearance. Open Face "American Bullseye" Crystal. HTTP Error 405 - The HTTP verb used to access this page is not allowed.Internet Information Services (IIS). 2800.900.3734 (fax). ac186bab57
Technical Information (for support personnel). (Sizes are in lignes, the archaic system in which old crystals are measured). Some believe it to be a mark left when the pontil rod is removed from the crystal during the manufacturing process, but there are many examples of smooth, concave glass objects from that time period which don't show a pontil mark, so that theory may not hold up. Typical glass thickness for an open face beveled crystal is 1.0mm - 1.5mm, but can be up to 2.5mm. Flat-thick crystal for open face pocket watch . Watches that have no case-lid over the dial of the watch are called "open-face". 404 Not Found .. These crystals have a thick, pronounced beveled edge, which almost gives them a magnifying glass effect.
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