Although this is an older Castello, with the shape # (57) stamped on the shank, and no oval around the Ks, a lot of the condition is like new, such as the nomenclature and the stem. With only 2Ks, it’s not supposed to be very large, but it’s a solid Grp. 6 size. There must have been different standards back then.
6” long, bowl 2.25” tall. Weight: 2 oz., 58 grams.