1-18
I have quite a variety of 70's machines, and the 1-18 is the BEST. Economic use of water for wash and rinse, then a fantastic long spray rinse through that ring of spray. It offsets the economic use water for agitation, but clears out all suds perfectly. I found a fabric softener dispenser on Ebay, but the bleach dispenser is hard to find.
After 3 years of collecting, I still have more machines to find for sure, but the 1-18 was searched for longingly and is a great prize.
LEt us know how she runs, I've received great advice from folks here on my restoration.