I have an old-fashioned barometer which does not work but may be worth repairing. Does it have any value?

The barometer is wall-hanging, shaped rather like a long violin and also incorporates a Fahrenheit thermometer and other features, though I am not sure what they are. There is no maker's mark of any description, though someone has scrawled on the inside, in pencil, '14 Gulay (presumably July) 1858 - P Toroni'. This was inherited from a relative in Jersey in the Channel Islands.