Let's just try to stay on-topic, here - and confine commentary to the era in question and not to modern stag grips on equally-modern revolvers.
That they're made today and are on a helluva lot of revolvers is a given - as are each shooter's opinion of their beauty,or lack thereof - and the way they respond in varying conditions, in differing hands.
'Real' stag grips - as supplied by the factory - are going to have a flawless fit to the triggerguard and backstraps - and they'll look like 'quality' - exactly like original, factory Ivory does - with perfectly-fitted escuthceons.
They're fitted while the piece is 'in the white' , and are numbered to the weapon so they can be mated up after final finishing.
After-market grips will give evidence of poor grip-to-frame fit, like so many of them seen today - a good example is that 1851 Navy Conversion shown above.
Vaya,
Scouts Out!