I share images of the movement that I bought today. It is from the beginning of 1900. Mark J. Pourrat & Fils (JP & F). Does it have any resemblance to the LeCoultre ebauches (LeCoultre Caliber #6 based) of that time or am I just an entusiastic? There are few information about J. Pourrat.
URL to LeCoultre Mov.: PocketWatch - Technik Taschenuhren-Kaliber LeCoultre