Art Deco Insico Pewter Tea Set

Vintage 1920's/early30's Insico Pewter line from Derby Silver Co. a division of International Silver Co. three piece #508 monogrammed tea set. Teapot, lidded sugar, and creamer. Made in Connecticut between 1920-1933. I can not figure out the monogram, it could be one fancy letter or two 🤷‍♀️. Teapot is 7 ½" tall, about 6" in diameter, has a 2 ¾" mouth opening, 3 ¾" base diameter, and is 8 ½" across to handle. Sugar is 4 ¾" tall, has a 2 ⅝" top opening, 2 ¾" base diameter, and is about 6" handle to handle. Creamer is 3" tall, has a 2 ¼" top and base diameter, and is 5" handle to spout. Creamer and teapot have some inside spotting ( see last pic ). Please see all pictures for condition. ***No bundling on this item because of weight***