>>The 9478 version, as
>>we see here, debuted in the late 1970s and seems to have been produced
>>through about 1985.
>
>Going out on a limb here, but based on the name I'd guess it
>specifically debuted in 1978?

'79, I think (available information is pretty vague and doesn't always agree), but probably it's a reference to the year the pattern was set, yeah. No idea what they changed from previous models.

--G.
-><-
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