Playfield was produced by Gottlieb as a 1 player replay version called 'El Dorado', an Add-A-Ball version called 'Gold Strike', an Add-A-Ball version for Italy called 'Lucky Strike', a 4 player replay called 'Target Alpha', a 4 player replay game made only for France called 'Canada Dry', and a 2 player replay called 'Solar City'. Also later produced as Premier's 1984 4 player 'El Dorado City of Gold' Gottlieb Domestic & Export Sales Sheets for Solar City: 2525 total Domestic Sales: 1738 Export Sales: 787 The above total does not include 109 Sample games produced in 1976 per handwritten documentation identified by Wayne Neyens as coming from Bob Malvasio, a draftsman for Gottlieb whose initials RHM can be found on schematics. Price to operator: $1125 FOB Chicago, per newsletter from authorized distributor dated March 1977.