Most electric dryers could be wired to run on 120 vols. The drying time was usually at least doubled or close to tripled. GE had a neat feature for their dryers operated on 120 Volts. To achieve temperatures high enough for de-wrinkling of wash and wear fabrics, the instruction book said to remove the lint filter and put this rectangular plate pictured in the book in the opening. This was OK because thin wash and wear synthetics and blends did not produce much lint. The plate had a small opening to restrict air flow and thus raise temperatures to the proper range. One other thing I remember is this note from the instructions for converting the dryer back to 240 volt drying. The dryer was to be operated empty for something like 30 minutes to burn lint off the heating elements and the back of the drum so as to have it sucked out of the dryer and not get all over the fabrics.
We had that generation of washer. It was solidly built with the cast iron tub weight in a ring around the tub to hold it steady as it started to spin. It lasted 5 years before the potato pulley mechanism started to give trouble and it was out of warranty. The next WH with the drop door was not so good. They had cheapened it to have cement weights which were not as heavy as the cast iron so it was not as stable. If the tub bounced too high at the start of spin, the snubbers came off the plates and things went south fast.