New Haven Mossberg 600AST
H241xxx
I have to imagine by the chart in the first page, this is 1979 or so?
Look's like your 500a is one of the newest we have in our data base so far.Mossberg 500 (12ga): V1460xxx. I picked it up a few weeks ago, used, with no box.
Shockwave (12ga): V1321xxx. Bought new about 3 years ago.
That makes me feel good about the 500. I picked it up off GunBroker for $280/shipped, so I feel like I got a pretty good deal.Look's like your 500a is one of the newest we have in our data base so far.
The shockwave is right behind it. Educated guess it's around a 2021.
Thank you for posting your numbers. I'll update our data base.
Hello and greetings from Central New Hampshire! I have a 600 at with a serial number of H217432. It's my understanding this is one that was manufactured in March of '79.I have a 600AT
Date of manufacturer for your firearm with serial number H486399 is 7-25-80.
From Mossberg.