Way back in BC (Before Computers) everything was handled with written paperwork and books. Boxcar lengths, station numbers on all railroads, routes, you name it, there were books or tariffs to cover it.
At that time, we used to have a thick book of STCC numbers - Standard Transportation Commodity Code. I believe, but not sure, they still have that or a variation thereof. But ANYTHING which could possibly be shipped had a 7-digit code number to identify what it was. I don't remember specifics, but 20-334-10 might be fruit, preserved, in cans. 20-334-20 might have been fruit, preserved, in glass bottles. The slightest difference often carried a different number (and sometimes, a different freight rate).
There was a STCC number for fly swatters, for broom handles, for soap, powdered, in buckets, whiskey, in wooden barrels, rockets, coffins, you name it, and it had a number.
I don't have one of those tariffs, but would bet money that somewhere in there, you could find a number assigned to the small appliances being discussed - probably 2 different numbers, powered and manual.