Magnificent Pink Swirl Opalescent Brides Basket Insert

This is a magnificent piece of pink cranberry swirl opalescent glass with a ruffled or crimped edge that is an insert for a brides basket. It has a mark on the bottom that is either a huge W, M, or N. It looks like a W maybe for Westmoreland, or maybe Northwood. Only part of the stamp is clear so I can't be sure. This pink cranberry glass dish measures 3.25 inches high, 9.25 inches across and the little base measures 2 and 7/8 inches across. It is in very good condition, no chips, no cracks, and no scratches that I can see. It does have a couple of manufacturers imperfections in the glass, each about the size of a sesame seed, one of which has the faintest stress crack over the imperfection. This would make a great replacement part. I believe this piece to be antique or vintage, but do not know for sure. It was purchased at an antique auction, but they did not mention the maker or age.