First a peeve of mine,
Why does every one wants to call them “pins” is beyond me..
They are NOT pins they have a hollow shank that flair’s to seat in the frame.
Ok here is my two coppers :In my Buck Tales of the 110
That very early on, there were small brass brads in the 1964 to 6? inlays but that did not last long .
Buck went to 52 shank rivets and drilled the frames for two of them.
They had small heads and later went to larger head rivets at around the time they went to all 110’s having frames drilled for to be able to accept 4 rivets….
Wow partner.. 4 hole frames? Yep!
All frames after the 2 rivet design had 4 holes in them for many, many years.
So, why the 4 rivet hole knife!
Story one>
Buck was going from 2 to 3 rivets on the inlays and had old stock so they drilled extra two holes to use them up. (But this don’t account for the 4 holes staying in the frames!)
Story two and most likely>
Buck experimented with the knife having 4 small rivets and then decided to jest do 3 when they went to larger headed 52 shank rivets.
Story three >
That they decided to use jest 3 rivets on production as that looked ok (?)
And custom knives are know to have jest used two or no rivets.
Buck does use up old stock and wastes nothing if they can help it..
So in keeping that in mind my sources say :
is it possible that some 4 rivet designs had larger head rivets – yes
Is it possible that some 3 rivet inlays had small rivets – still yes
Is it possible that some knives may have had a mix of the rivets- of course
I feel one should collect what you like and if there is a type or some thing
you feel is important then you should strive to have it ….
Good luck!
And least I remind you even Santa cannot find
“The Complete Book of Buck Knives”!
Collect what you like and like what you collect …
Your collections don’t have to please any one but you!