here are a few key identifiers and my guestimate
1 - the throat keys share a post --> pre R13
2 - the trill key guide is sheet and not a slotted barrel --> pre R13, before 1955 but this one is an even older design
3 - the throat key had no adjuster --> 1939ish and before
4 - the left pinky keys have one pivot point --> 1934 and before
5 - the thumb rest is one screw above and one below --> 1931ish and before
6 - the lower right pinky key uses a flat spring (which is gone) and the screw shows a dot on the top side
which looks like this when there .. unsure on exact year-ish but along # 5.
7 - The 12th (out of 13) pictures actually shows part of the serial number to the right of the chunk that was removed when someone removed the probably stuck bell which looks like "9424" aka manufactured in the year 1931, which fits per the pictures.
8 - you have some tonehole damage; the lower joint ring was removed and a shimmy was added to make it tight, and it was put back on backwards.
9 - the "101" was inscribed on there by someone
you can look through the pictures as identifiers here ==>
http://www.clarinetperfection.com/clsnBuffet.htm
So 1931
That was fun ...