Hi, I will check up for you but depends on the colour / whether dug or mint condition and quality of embossing. It should have Schweppes , Margaret Street on the bottle to be pontilled.
Is there any glass makers embossing around the base of the bottle no 82 with the marble in the neck. These are called Codd bottles and were patented in England in 1872 and variations are still being used in India. Thanks
As being a Plumber this is definitely a float used to attach to a valve which shuts off water flow to fit in to a toilet cistern or even horse trough etc.