WHO Made It? Topaz and Blue Glass Decanter

Found this at an antique bottle show. I love it but wish I knew who made it ... I'm stumped! Topaz & blue glass decanter with rings & pattern, a monogram (silvered? haven't polished it) , hollow stopper, 13" tall, footer diameter 3 & 3/4". Seller called it an apothecary jar but I don't think so. Seller said he had it for 25+ yesrs. Decanter is numbered under the top lip "43", please SEE PICS. Stopper is numbered "02" (I think). Can't find any other markings. At first I thought Morgantown, "Genova" two-tone ... but can't find any Morgantown glass with a footer like this piece. Could it be Tiffin? H C Fry? Steuben? (Some Steuben pieces have similar rings on the body). Which company numbered pieces with needle etch, anyone know? The monogram? Well, there's a "C" not sure about the right & left letters. What do you think? Does anyone have a catalog source? THANKS!!!