"Rare Regina 15 1/2" Musical Bell Disc Box. Rare Regina 15 1/2" Musical Bell Disc Box; This model is serial #2160023. Line 216 starts with serial # 2160200 and ends with 2160200. Distribution was as follows: 71 units with cases were made for general sale and 95 movements without cases were shipped to the yale Wonder Clock Company. This is one of the 71 units and is considered one of the rarest music boxes made by Regina. Double comb, no broken teeth, original condition throughout, in excellent playing condition with discs."