[SeattleCarGuy]

Third owner of the car was Tom Moldenhauer, also of St. Paul, MN, but unfortunately, he died in 2014.
Fourth owner believed to be Jerry Altman, also of St. Paul. Or, maybe Gerald Altmann, Jerry Oltman, etc. - not sure of spelling???

First owner's family is searching through photo albums and files to find any links...

Thanks to all for help.