I'm trying to find out how old my refrigerator is. It is still working
although it leaves water on the floor which I wipe up periodically. It
still cools and freezes but I know it's on its way out. It's quite old
because it's olive green in color. Here are the specs from the ID tag
on the unit:

Sears Coldspot
Model 106 7645340
Serial# E43946062

I'm looking to replace it but want to get an idea of its age because I
want to see how long this model has lasted.