Got your PM tonite,,was away at a rare gunshow this weekend..
Good pics of the grips,,great you were able to remove them and get a good look. They do look older and maybe from a 1st gen as mentioned.
Agree with the rest of the group that they look to be ivory. I can see some color streaks in the outside surfaces as well in the last pic of grips. too.
I just had doubts when looking at the first bunch of pics.
The 3 holes behind the medallions seen on the inside was a common Colt method of attachment of the medallions on their Ivory grips.
You can find that on other known Colt provided ivory grip sets.
..Not that someone else making a set can't just copy the 3 hole look. But it's another positive note to add to the grips and gun.
I don't really see anything else in the pics.
The BB# is there.
It's not meant to match the ser#. Only a 2nd Generation added feature to separate original 1stgen Buntline bbls from 2ndgen bbls.
The BB#'g started at BB100.
I do not know if the BB number is supposed to be sequence with the Buntines produced ( yours would be the Buntline #904 produced in the 2nd Generation SAA if so.
I don't know how many Buntlines were mfg'rd the first yr if this is in fact a 1st yr gun (not doubting the fact).
I can check a book I have. I think the # may be in there.
It should show if the BB# would be within the total number Buntlines produced at that point in production. Or if the bbl (BB#) might show it to be from another, later production gun.
I think the bbl is a standard factory assembly bbl from the address roll markings though and not one separetely purchased from the Colt Repair & Service Dept and used to replace a shorter orig bbl on the gun to 'make' a Buntline.
I'll see what I can find..
Added:
Ser# of op's gun is 18551SA
My book says it's a 1958 mfg gun.
It shows 185xx as the beginning ser# for standard SAA production in 1958
Buntlines were serial numbered in right along with the standard SAA production bbl lengths.
However the first 2nd Gen 'Buntline' was not produced till 1957
It was #12207SA.
(2nd Gen SAA production started in '56)
In 1957 a total of 595 'Buntline Special SAA' were mfg
in 1958,,a total of 1,644 Buntline Specials were mfg.
(The most Buntlines made of any year)
The Starting BB# was BB100 in 1957 (according to the resource(s)
IF the BB#'s were sequencial with production, then BB904 (the OP's gun) would be 804th Buntline off the production line (yes??)
600 in 1957 (approx as ser#'s & prod are never exact)
Then an extra 200 into the yr 1958 when the OP's gun was made.
For the 80X Buntline produced. BB#804
Though the guns ser# places it extremely close to the beginning ser# they give for the start of 1958 production.
I would conclude it was the orig bbl.
JMO of course.
A long way to get here, but I thought it was an important to try and place the bbl as being orig to the gun as it is not ser#'d.
The BB# may be a way. The Buntline bbl is the defining feature of the gun afterall.
Another thing I found is that the Batch/Assembly number ( 3 digits) is supposed to be stamped on the front face of the cylinder.
(Not the ser#) on this early of a 2nd Generation.
Batch/Assembly number is also found on the loading gate inside surface. Just open the gate and it is visible.