Mine is a bit earlier and is not a tourbillon for the wrist. It was probably finished in the early 1850s. Here is a link to a gallery of photos. The gallery is old and since it was made, we have determined that the last picture in the gallery probably does not actually feature the owner of the watch. Since the pictures were taken it has been cleaned and is now running like a champ. JohnCote http://www.johncotephotography.com/Watches/JJ-Tour_3/index.html
The link seems to work for me from both of my computers but I will post a few of the pictures. This watch came from the estate of a son of one of the original owner's daughters. THE HISTORY AND TECH DETAILS: THE BOX WITH OWNER'S NAME ENGRAVED IN CARTOUCHE: THE OPEN BOX WITH WATCH AND ACCESSORY CRYSTALS: THE DIAL: THE JJ SERIAL NUMBER AND NAME WITH RAILROAD DEDICATION: MAIN DEDICATION: THE MOVEMENT: THE TOURBILLON ESCAPEMENT WITH SPRING DETENT: A BIOGRAPHY OF COMMODORE G. B. SIMONDS WRITTEN IN 1892: