I recently acquired a nice "high-grade" swiss movement that was in a Charles Oudin watch.
The movement features wolf teeth winding wheels, non-magnetic hairspring, counterpoised lever, etc.
Unfortunately the only markings on the watch are sets of numbers, and an oval stamp containing the letters "E.Ld"
I've seen this marking on another similar-identical movement from a Charles Oudin watch.
Would anyone have any knowledge about what maker "E.Ld" may refer to? I can't find any reference to it anywhere in my usual references.