Surely the fancy cut rims were an added expense and seems to correlate to top notch cutting of the period. As to the cut ribbons/swags, I do associate them to the regency era, of course they probably never really went out of style. A very similar example to mine is shown in "MILLERS GLASS" a buyers guide. To quote the book: " An oval cut-glass butter dish, cover and stand, all cut with bands of diamonds and prisms, with crenelated rims and ball finial c.1800". Although the cutting a bit different, the basic shape is the same. The only difference besides the cutting, is the fancy rim on the stand in the book example is straight like the bowl rim, where as my example flares outward. Curiously the same book shows a oval cut dish c.1810 very much like the examples in your last link. A note to this entry states "these dishes often had a rebate at the foot, as they came from ornate table centerpieces".