The white rectangular sign near the center of the backglass is silk-screened with the words 'PRESS BUTTON' but we do not know what makes this light up, or when. We also do not know the significance of the five silkscreened beach balls that the one lady is juggling. The Manufacturer Plate pictured in this listing has several numbers on it. We asked a collector in Spain to explain them, hoping to glean a Date of Manufacture and a unique Serial Number. His explanation indicates neither a DOM or S/N is shown there, as he believes this is what the plate says: 22-9-67 is the date for the approval of operation of this machine. 26-6-1971 is the last date the machine was inspected by the governing authority. Probably, they later changed the law and such inspections weren't reflected on the machine. 7193 is the number of machine inspected, in order, probably for that year. Those inspections weren't only made for pinballs, so 7100, for instance, could be another completely different machine than a pinball. B32807 probably is the reference of the administrative dossier. He, and we, invite corrections to this explanation.