Real or Fake UK Silver hallmarks?

Dear Forum, bought at auction, 15.0 cm tall octagonal castor, weighing 90 grams, simply worked but nicely proportioned.
The marks suggest Chester 1740 but the makers stamp, Reid and Sons, did not open for business for another 49 years!
Caveat emptor but cannot see any suspicious markings. Very clean marks though.
Many thanks for your thoughts,

This is a real Chester hallmark for sterling silver with the mark of Reid & Sons. However you have mis-read the date mark. The sequence of Chester date letters 1726-1750 were reused 1901-1925, but with a different form of the Chester town mark. So your caster is dated 1915.


Brilliant Phil.

Thank you.