thank you Yes, I did remember this thread, although thought, from memory, that the S had to be over a Plimsoll Line to qualify for the maritime connection - I do in fact have a sherry glass, sporting this double line. So, conclusion is that almost certainly a Stuart manufactured piece, and possibly the later more angular S with hints of corners. Given another 50 years, I might just acquire the full service.
P.S. having trouble with my PC currently, and see that I have added this comment to the original thread, by mistake. Grateful if the mods. will remove please :pb: [Mod: removed from other thread as requested]