Westclox 61-J Dura Case Windup, 2 key, alarm. 1931 - 1934 Nickel plated heavy metal case. Metal with luminous (glow-in-the-dark) dial and hands. Patented U.S.A. No. 1709146, No. 1358457, No. 1563431 Other Pats. Pend. Case Made in U.S.A. by DURA Model 61-J 61J # 406 One of six "Dura Cased" clocks introduced in the early 1930's. Part of the LaSalle Series. The clock has a very heavy metal case. All six are highly collected by Westclox enthusiasts as well as other clock collectors. Most try to get the entire set of six to complete their collection.