Guess they were precursors to the Grabbers.
Or maybe the 650.
I remember the manager of our gun club way back in the early 70s spent most of his day cranking out shells on 650s, which we could buy for about $2 a box in any gauge.
They might even have been the 500 or 600 models. Whatever they were, they got one helluva workout almost every day.
I'm pretty sure the Grabber and 9000G weren't around then and the aggravation of getting his shells to consistently chamber in my 1100 was what first convinced me never to own a loader without a resizing station.