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The Keystone Camera Company was an American manufacturer of consumer photographic equipment that began in 1919 in Boston. [1] Notable products were Movie cameras , 126 and 110 cameras with built-in electronic flash (the "Everflash" series).
Keystone Watch Case Co. was the name of a conglomerate of watch companies assembled by Theophilus Zurbrugg by 1904. Keystone purchased the rights to the E. Howard name (a legacy of the Howard Watch Company ) in 1902 and sold Keystone-Howard watches.
If the number on the Keystone stereoview: begins with the letter V, an Underwood & Underwood negative was used; begins with the letter W, an H. C. White negative was used; ends with the letter T, it is part of a Keystone “Tour of the World” set. On some views a number will appear in the upper center of the stereograph. This is a “set ...
The Model 23 was a 16-size chronograph pocket watch. The Model 4992b was in a 16-size case with a black dial. It was used as the pocket watch for the U.S. military, featuring a less accurate 21-jewel railroad grade movement. [citation needed] By 1970, 13,086 Hamilton Model 21 Marine Chronometers had been produced.
The Keystone XLB-6 prototype was created by refitting the final triple-tailed Keystone LB-5 (serial number 27-344) with an LB-5A tail unit; longer (75 foot) straight-chord, untapered and noticeably swept-back wings; and 525 hp (391 kW) Wright Cyclone R-1750-1 radial engines suspended on struts between the wings rather than mounted on the lower ...
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E. Howard & Co. was a clock and watch company formed by Edward Howard and Charles Rice in 1858, after the demise of the Boston Watch Company.The pair acquired some of the material and watches in progress, based upon a lien against the defunct company held by Rice, but they were unable to buy the existing factory or machinery, so they moved to Roxbury.
The B-3 was originally ordered as the LB-10A (a single-tail modification of the Keystone LB-6), but the Army dropped the LB-'light bomber' designation in 1930.. Although the performance of the B-3A was hardly better than that of the bombers flown at the end of World War I, it had come a long way in terms of flight safety.