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Vacheron Constantin

This is one of the points which still confuses

 

Michel mentions the threading was American Unified Coarse, which was a term that didn't come into use until after WWII. At the time we suspect this watch case was produced, the Sellers Standard aka United States Standard was the common American thread. If the case had USS threads, the assumption that American machinery was used to cut the threads makes sense. Where that machinery was located, however, is still an open question. The WD engraved on the case back is diagnostic of British military inventory, after all. I also noted in researching this aspect that, practically speaking, USS and British Whitworth bolts were interchangeable so their differences were slight. I'd very much like to review the measurements that IDA obtained from what they describe as a crude case made with poor quality steel. 


Another point of confusion stems from the original 2003 story in Business Montres which identified the jeweller Herkner as being in Dayton, Ohio, near the Wright Brothers workshop.  Herkner was actually 300 miles away in Grand Rapids, Michigan. The journey by car in 1910 would have been at least two days!  Meanwhile Columbus, the state capital and largest city in Ohio, was only 70 miles from the Wright Brothers. If they were determined to obtain a Vacheron & Constantin movement, Columbus was served by at least two jewellers offering V&C watches; Ross and Bonnet. There were also V&C agents in Toledo and Cleveland, Ohio.  Unfortunately, this mistake in geography was continued by the Institute for Digital Archaeology who have repeatedly suggested the Wright Brothers were from "the Grand Rapids area".  Chicago, Detroit, Cleveland, Pittsburgh and Nashville are also within 300 miles of Dayton ;-)

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