ODOMETER ROLL OVERS on 1990 Chevrolet 2500 Pickup

I HAVE A 1968 CHEVY CHEYENNE WHICH THE ODOMETER READS 68,000
DO THESE OLD TRUCKS ODOMETERS ROLL OVER?
I NEED THE READING FOR INS.

THANK-U FOR ANSWERING

1 answer
Yes they roll over but usually the left number would be slightly higher than the other numbers if it rolled over, So if they line up evenly it probably didn't roll over