bigbug1964
·The version in the Longines museum has still both arms and it is a pocket watch holder (stand). I personally would date it somehow in the 1920’s, maybe 10-20 years earlier. Longines itself has mostly no information about these kind of things, as they didn’t file information about their advertising stuff. They have both the same dimensions, the lamp is a rebuild done in the US, the other one was originally located in Spain