A wonderful little wind up tin see-saw or teeter-totter with a celluloid boy and girl having a great time!  The toy is marked MADE IN JAPAN on the side of the tin base (see photo #8) and we believe it was made sometime in the 1950's.  It is wound by rotating the base and it will slowly revolve while the children ride the see-saw briskly up and down (be sure to watch the video above). The toy measures approximately 6 1/2" in length and about 4 1/2" tall with the children being held level.  It is in excellent condition with beautiful bright colors and no damage.  The cord in the arms of the children is a bit loose, but it only adds to the fun of watching them swing their arms as they go up and down on the teeter-totter.  PLEASE REVIEW ALL PHOTOS AND USE THE ENLARGE AND ZOOM FEATURES FOR THE BEST DESCRIPTION OF THIS CHARMING VINTAGE JAPANESE TOY.