Although I remember churning ice cream as a kid, (and competing with my brothers who could keep their hand in the super cold ice salt water slush afterward), that wasn't actually it.
All I did was google search those dates, specifically as they were marked (using the same abbreviations) and felt sure someone would have put them like that in a listing for one that they were selling. With a super low likelihood of some other apparatus having the same set of dates it made it not as hard as it seems.