When did you ask? cause I never received anything from you, sorry. To answer your question the best I can come up with for the mfg date is somewhere in the mid 1980's. hope this helps.
Would you be interested in trading it for a Mossberg 500 combo pack which includes (2) barrels 18" & 28" and pistol grip plus the wood stock w/ recoil pad? It is in very good condition. The 18" barrel has 10 rds through it. I can include some assorted 12 ga shells as well. Thanks!