I'm thinking Eskimo or Jiffy gas.
I had a jiffy model 30 for years too. The old Jiffy was a great heavy duty tank auger. I have a Nils USA auger with a Tanaka motor.(270 model) This auger is lightweight & can it cut fast! No down pressure is required to use the auger. I have a bad shoulder & this auger is breeze to use! They also offer a 7 year warranty on them too. Other augers only give you 1 or 2 years. Best auger I have ever used. I have used all the brands out there between friends on the ice.
I will deal with the Jiffy this year, but I will have a lightweight electric for next season.