L. Leroy & Cie a French watch company since 1785 came out with the most complicated movement in the world in 1900 called Leroy01. It remained so until Patek introduced the calibre 89 in 1989
Here's a minute repeater.
1) The number on the outside of the inner cover of the caseback is 13139
2) Inside caseback number is 14070
3) There is a diamond shaped hallmark with a key in the center and 'S' 'O' on either side. With an eagle head below.
4) No numbering on the movement.
Can someone please throw some light regarding the model number, hallmark, movement & approx year of mfg?