Thank you in advance for any help you may be able to provide. In cleaning out my father-in-laws house, we ran across a key wind pocket watch. There is no manufacturers name on the face, roman numerals, and a second dial at the six o'clock position with the seconds deliniated at the 15, 30, 45, and 60 second marks. It has a hinged front and back. On the back was engraved a scene with three dogs and a tree. Opening the back there is a small engraving of a three wheeled steam locomotive with smoke coming out of the smokestack and what look to be the numbers 0800. Below that is what looks to be a diamond shaped mark with a bird in it. The bird's wings are pointed down and legs are visible under it as if it were walking. At the base of the back case there is a capital "E". Inside there is a second cover over the movement. Engraved on the outside of this cover are the words "Cylindre" and "8 rubis". On the inside of this second cover are the words "metal" and another capital "E". There are few marks on the movement itself that I can discern. The adjustment is marked "Avance" and "Retard" Around the winding key hole is written in script "Sie 25" and "No. 571" The only other mark I can find on the movement itself is a small round stamping of "Cortebert" around a six pointed star. I apologize for the poor photos. I do not seem to have the knack of taking close ups and make details visible.