1940 BEACON.Rose gold (filled or plated) case including the back cover.Back marked BULOVA QUALITY and serial #.No markings on the inside of case.Crown is too worn to say if it's original.I bought this one a few weeks ago and just received it today.It was bought as not running but as soon as Itook the movement out of the case it just started up.The reason I got this one was the movement is different than the examples in the database.It's a "10BX" which I don't see listed anywhere.Go figure.Denis
Nice Beacons, they really are shining examples!
Lisa over at Watchophilia has a couple of 10BX examples, 15 and 17 jewels.
http://www.watchophilia.com/photogallery/bulovas-1940-1949/a1941-watertite/
http://www.watchophilia.com/photogallery/bulovas-1940-1949/a1941-watertite2/