Hi ,
from the photos you posted the foot looked as though it may have been a domed foot ,a deep hollow shape to the underneath,though now it sounds more like a flat solid foot possibly with a polished pontil , either way it still sounds like a later reproduction , several companies were responsible for glasses like this in the UK , in the 19thc and into the 20th c , Stevens and Williams , Edinburgh and Leith I think and a few in Stourbridge were known to have made Jacobite copies, yours look to be very nice examples of there type and being a pair ,even nicer .
cheers ,
Peter.