Model info
I am positive that this is a 20 series...Energy Saver V model KDC-60. I have the built-in model equivalent in my basement and the button configuration matches mine. The 19 Custom model I believe only had 2 buttons - Normal Wash and Rinse & Hold.
The 20 series had 4 buttons - Heavy Wash, Low Energy, Rinse & Hold, and Energy Saver/No Heat Dry option.