Bob,
Was that a can opener on the end with a cork screw folded into the handle? Worked perfectly but left jagged edges – no problem for people in those days.
The kenwood chef attachment worked well, but it was more trouble to keep fitting it to the machine! We have the cheapy one which my wife uses for the dog food wcans without ring pull, and I have to open other cans with the decent tool (because every time she puts it through a dish washer cycle, it needs a little lubrication!)
Brabantia, made Holland years ago, a little stiffer than the cheapies but works on all but the poorest of cans.
Almost everything was 'right-handed' a century ago. People were not allowed to be lefties! Perhaps it was the left and right hand drive automobiles that ushered in the steady change?