I thought at first the advertiser made a mistake, but after seeing several different advertisements—from 1979 to 1980, then again from 1989 to 1992—I found that there were indeed two different versions of the Model 1447; although only version 2 has been uploaded to the Internet (unless version 1 was not identified). I know there have been a few other reused Eureka model numbers, but the span between was greater than 10 years and some were JCP exclusives.
Here are two advertisements that attest to the fact:
Comes to the Rescue!
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