The D17 and D14/15 were made from 57-68. In 1960, the D17 went to series II, the D14 changed designation to D15. According to the original production numbers, there were 41,000 D14/15's made - roughly half were D14's. There were around 800 LPG's, mostly all were D14's. Of the D14's, only 54 were SFW (single front wheel) originally, so that is definately rare. There is no data on how many had the combination of SFW and propane, if any. A SFW, dual narrow, or adjustable wide could could be interchanged between tractors. Allis collecting is growing. I think Unofficial Allis web site gets 1M hits a year. However, you don't pay a premium like JD's or Ford 8N's. For a D14, usefullness still rivals collectability. I do everything on my small acreage with my '57 D14, including run a baler. Parts are not a problem. If you hang out here or Unofficial Allis, you will get connected to lots of people with parts.
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