I purchased a new Harrington & Richardson 12 gauge model 088 from K-Mart in 1980.
50-100 USD
Your H&R model 088 was made sometime between 1983-1986.
About $125, depending on condition.
"BA" prefix indicates 1983
No public data- sorry.
Serial numbers were not required before 1968
Az476987
http://www.cherrys.com/longguns.htm http://www.cherrys.com/longguns.htm
'AZ' prefix indicates 1983
'AY' prefix indicates 1982
"AY" serial prefix = 1982.