Pictured in this listing is a Sample game imported from Belgium having serial number 01006 S. It has a plexiglas backglass. The red and yellow bumper caps have rounded dome tops instead of the inclined flat tops seen on production games. We have annotated a motor board image to encircle two extra relays that do not appear on the sample schematic. Only one of them appears on the sample motor card. They was identified by the owner as the "first coin relay" and the "Y" Relay (second coin relay). The following information explains how the A-B-C-D rollovers operate to award added balls and is taken directly from the Majorettes schematic: At the start of the game, all four rollovers (A-B-C-D) are LIT. Each time you cross a rollover lane the corresponding letter goes OUT. When you get all four letters out, you get an add-a-ball and the letters reset on a "mystery" basis, which means from one to three letters will re-light, and the other letters will be knocked out (spotted) for you by the machine. Whatever letters have been re-lit will need to be crossed again to get another add-a-ball and yet another "mystery" reset. This "mystery" reset process for the A-B-C-D rollovers continues for the entire game. The "mystery" function works as follows when the rollovers are reset after getting an add-a-ball: - The A rollover is always re-lit. - The B rollover will be spotted only if the RED #3 bumper is NOT lit. If the RED #3 bumper is lit, the B rollover will be re-lit. - The C rollover is always spotted. - The D rollover will be spotted only if the YELLOW #3 bumper is NOT lit. If the YELLOW #3 bumper is lit, the D rollover will be re-lit. Thus, when the A-B-C-D lanes reset, the number of lanes that are spotted for you (making it easier to complete the sequence again) is a function of how far along you are in completing the bumper sequences. The closer you are to lighting an add-a-ball special via the bumpers, the fewer of the A-B-C-D lanes that will be spotted for you. The mechanics of the spotting function are not explained to the player in the instructions, which is why this is called a "mystery" spot feature.