the difference in colour/quality between some feet and the rest of the article might be due to the practice within the glass trade whereby manufacturers acquired their moulded feet from a group of itinerant workers known as 'pinchers'. In the U.K. these guys apparently used some form of tongs which incorporated a mould at the front end, to produce the square feet seen on rummers like yours - believe they also produced feet for some sticks.
G. Bernard Hughes, writing specifically of these 'pinchers' says - ('English, Scottish and Irish Table Glass') ""They supplied units consisting of feet and stems to the established glass- houses at cut prices, in metal inferior to that of the blown bowls: the contrast between the two metals on a single rummer is often conspicuous.""
Don't really know what gave rise the the square foot - apart from rummers they appear commonly on monteiths c. 1800 and you see them on salts, but they don't seem to go back (at least in the U.K.) to much before about . 1790 ish.
I have some rummers with square feet, but only with ovoid and bucket bowls - my only cup-bowl rummer has a plain circular foot - I think the square foot with cup bowl is far less common than with the ovoid.
My take on reading Tim's comments about strength between stem and bowl was a little more along the lines that it was the merese or collar - the ring immediately under the bowl that strengthened the join - yours appears more as a knop, but may well serve the same purpose.
Think I got the gist of your first line, but not entirely sure of the meaning - your punctuation not my strong point - and though some of our members across the water are very clever, we should try to make our meanings clear for them, especially, since posts in Glass are read by many folk from around the planet.
anyway a good addition to your collection, and at a bargain price to boot.
