I just ran into this watch this weekend, and am kind of enamored with it, although I must admit it is out of my realm of collecting.
After doing considerable research on tis watch it is confirmed that it is an original John Forrest watch, as much as John Forrest watches were made following his death in 1871, they were definitely not of the same quality, but were still made by the company that bought his rights. It seems that they are not considered true John Forrests if madde after that date.
Anyways this watch was made in 1856 the silver marks confirm that, and are the same serial number on the case as the movement. The case makers were Richard Oliver and John Edwards that worked in the same area as John Forrest. The watch is running but needs a cleaning, hopefully that will not be to great a problem, but few watchmakers want to work on them on this side of the pond. Comments as always are appreciated, good or bad.
Here are some pictures.