Can you tell me how old is this machine model#20972

Hi djpb and welcome if you
Follow instructions on link below and you may be able to determine the age. Good luck

Appliance411: Service: How old is my appliance? Age, date of manufacture code decryption help for your appliances (http://www.appliance411.com/service/date-code.php)

Kenmore?
You will need to enter the Serial Number for that above link: