Hey guys,

I am trying to figure out the manufacture date of a 59B 410 shotgun but I am having trouble narrowing it down.
This gun was bought by my great-grandfather, given to my grandfather, which was given to me when my grandmother passed away. I restored it and am trying to date the gun for the display case I have to show it off.

I hope some guys on here can help me get details on part\layout changes by the years, fill in gaps of knowledge, and ultimately find the date of manufacture.
I originally dated the gun at 1957, but then realized my great-grandfather died in 1955, so it makes it really hard for him have purchased this gun.

So any help you can offer I would really appreciate it; especially if I have anything wrong.

Important note: The gun does not have a serial number.

I called about 6 gun part resellers and gunsmiths of savage arms weapons. They could not really add to what I had or they could and didn't want to spend the time to tell me\write it down. Savage arms, the company, didn't help at all either - Their response was to send a letter (PHYSICAL LETTER) to their history department asking for help (they don't give a guarantee to answer my questions and it cost $65).

Here is what I have so far:
- The Stevens Model 59 was made between 1934 and 1973
------> The Mod 59A started in 1934, then it was replaced by the Mod 59B in 1949
------> Somewhere before 1973, the 59C replaced the 59B (Although I have never seen a 59C for sale)
- Savage dropped j in j Stevens when stamping in 1940
- Stevens AND Savage names appear on the gun, post 1948.
- Savage closed the Chicopee, Ma plant in 1960, so any gun with that name must be pre-1960
- Govrnt required serials starting in 1969 (passed bill in 1968)
- Date Stamps info (1948-1969)
------> After 1948, all Stevens and Savage guns carried a date code stamped onto the gun. The date code stamp was in a 1/4″ circle or oval containing a letter and a number. The letter corresponds to the year of manufacture using the following translation. A is 1949. B is 1950 and so on through X. This code can be found almost anywhere on the gun and sometimes requires removing the stock to find it.
-----> "O" and "Q" were not used because of the similarity to zero.

A 1949
B 1950
C 1951
D 1952
E 1953
F 1954
G 1955
H 1956
I 1957 ---> I believe I found a stamp on the top of the barrel just in front of the receiver (14I). It was hard to make out, but I believe it was 14I or 11I.
J 1958
K 1959
L 1960
M 1961
N 1962
P 1963
R 1964
S 1965
T 1966
U 1967
V 1968
W 1969
X 1970

Thanks!!