Mossberg Serial Number Data Base

I added another 930 to my collection recently, a new-old-stock 930 JM Pro (24", p/n 85118) - it's dated 2021-02 on the box with a serial of AF0077xxx

Newbie here, I'm trying to find out when my 935 was made. I traded for it & the original owner got it as a gift & it just collected dust (oh, God there was a LOT of dust) in a closet because it wouldn't cycle. The first couple of the serial is AMO77. I'm guessing from this chart, it's about 2015 give or take, is this a fair assessment?

New Haven by Mossberg 12 ga 600AT serial number H259xxx.
Bought it new in Grand Forks, ND in fall of 1979.
Mossberg told me the date of manufacture is June 19, 1979.
Probably not more than 400 shells put through it.

That weapon lived for a while in Grand Forks, then Oklahoma City, then Dover Delaware, and finally settled here in Montgomery Alabama.

Welcome to the forum Cooter.

20 ga Westren Field G 777xxx
16 ga Mossberg 060xxB

New Haven Mossberg 600AST
H241xxx

I have to imagine by the chart in the first page, this is 1979 or so?

I no longer own the Mossberg I had as I gave it away to my daughter and son-in-law. I bought it new in the 2000's though.

Hi, I'd appreciate some help from your guys knowledge. I have a 500 ATP serial j110922 from 1983 with the adjustable choke barrel. I need to replace the 8 shot mag spring. Finding part difficult to find. Can I use the 590a1 spring? If not suggestions for sourcing one please.
Best J