▁the ▁ 5 0 ▁were ▁returned ▁for ▁credit , ▁but ▁a ▁few ▁deal ers ▁object ed ▁and ▁kept ▁their ▁cars ▁leaving ▁( by ▁all ▁accounts ) ▁less ▁than ▁ 1 0 ▁in ▁the ▁general ▁population . ▁Mr . ▁Thomas ▁Kn ob lo ch , ▁a ▁second - gener ation ▁Old sm obile ▁deal er ▁in ▁Er ie , ▁Pennsylvania ▁was ▁one ▁of ▁those ▁deal ers ▁who ▁refused ▁to ▁rel in qu ish ▁his ▁car . ▁ ▁He ▁instead ▁held ▁on ▁to ▁it ▁as ▁a ▁collect ible . ▁ ▁Real izing ▁its ▁incred ible ▁r ar ity ▁and ▁place ▁in ▁both ▁G M / Old sm obile ▁and ▁Ind y ▁ 5 0 0 ▁history ▁he ▁drove ▁less ▁than ▁ ▁over ▁his ▁many ▁years ▁of ▁ownership . ▁The ▁Kn ob lo ch ▁family ▁sold ▁the ▁car ▁after ▁his ▁death . ▁ ▁Eng ines ▁ ▁Gallery ▁ ▁See ▁also ▁ ▁Old sm obile ▁C ut lass ▁ ▁Old sm obile ▁C ut lass ▁C iera ▁ ▁Old sm obile ▁C ut lass ▁Cal ais ▁ ▁Old sm obile ▁ 4 4 2 ▁ ▁Old sm obile ▁Hur st / Old s ▁ ▁References ▁ ▁External ▁links ▁▁ 4 4 2 . com ▁ ▁Old sm obile ▁Club ▁of ▁America ▁▁▁ 1 9 7 0 - 1 9 7 1 ▁C ut lass ▁Supreme ▁S X ▁registry ▁▁ 1 9 7 2 ▁Old sm obile ▁" V ▁Code " ▁Reg istry ▁( 4 5 5 / M 2 0 ▁cars ) ▁ ▁w - body .