This is an American threaded art glass bowl and saucer, slightly bigger than another one I have listed in my shop, and with the opalescence and more crimps. The glassmaker is one of the few companies in Sandwich, Massachusetts, such as the Boston and Sandwich Glass Company or the Cape Cod Glassworks, along with a few others, and thus known as Sandwich Glass. However the Boston and Sandwich Glass Company is the glassmaker that produced the hand blown machine threaded pieces. The date is circa 1880.
During this time period the function for these bowls and saucers were for use to eat crackers and milk.
The bowl is 2 ¾” high and 4 3/4” in diameter. The saucer has a 6 1/2” diameter.
The thread is thick and fewer per inch. The color of the thread is cranberry. The glass is clear. The overall appearance is thus cranberry or pink or pale red. The opalescence is observable at the rim of the bowl, the pontil on the bottom of the bowl, and the middle threads around the bowl. On the saucer, the opalescence is on the underside rim and the bottom where the pontil is and the surrounding threads.
There are air bubbles. There is some estate grit caught between a few of the threads. You can see where the threads started and stopped. There are no chips, nicks or cracks.