Two weeks ago I buyed parts of a old billodes pocke watch. The movement has a rectangulär anchor and not a anchor ligne droite as you see usually. It reminds more to longines but it's definitly a billodes. My idea is, that it might be a quite early construction. One fact is that it's a key wind movement. Additional the "click" for the ratches wheel miss a spring for back pressure as I only knew in some old keywind Georges Favre- Jacot movements (definetly before 1882- missing silver silver hallmark). This races problems by the time and it was chanced in younger movements. In this case I could not use hallmarks because the case is made from silveroid (argentan/ german silver / hotelsilver ) . It has matching numbers : 76673 but I'm not sure about any chronologie during this period.
If someone has some thoughts how I can go on to classify the age of this movement or even why it excist please: share. May be someone has surprisingly the same movement with some additional signs.
Picture1 : the typical billodes anchor until now I've just seen as a crown winding build around 1900.
Picture 2 and attachment: My question