28000 mile 70 Swinger

The odometers in the older cars were made to do that so you could tell when a cars mileage rolled over since they only had the 5 digits instead of 6

My grandfather who worked in a dealership since the 50's said it was common for traveling salesmen to run a cars mileage up over 100000 within a few years and then try to pawn them off as low mileage cars.