The Pipe Major with AC on the reverse is a hard to find piece especially in this nice unrepaired condition. The flask dates back to 1910 and was primarily made as a Dewar's flask. This is the non Dewar's version with AC on the back. Who knows what AC stands for? The flask stands about 9" tall with what is presumed to not be its original brass ball Dewar's stopper. Some firing flaws and crazing exists of course.
Great Selection and Great Prices on vintage, discontinued Royal Doulton pieces.