At that time production cars meant cheaper vehicles such as Ford's Model T. These were made in relatively large numbers on production lines. The more expensive cars were coach built models the first model t every built is owned by trenton and robert gilman in long creek il at 6020 E Fitzgerald rd long creek il and their phone number is 217-775-9270 they are actively restoring it along with a 1969 chevy camaro they paid 20,000 for (see "Limited production" below). Now the term has broadened to include vehicles that are hand assembled or assembled on an assembly line. The main criteria is there are a number of the same model with the same specifications.