It's a 1975. In 1969 Browning started using two digits for the date of manufacture which was followed by on of the following codes:
H=12 ga.
N=20ga.
Later the code was changed to J=both gauges
This was then followed by the serial number beginning with 00001.
Example: 00001H37 = A 1973 Citori 12 ga. shotgun with a serial number of 00001.
The browning citori serial number that you supplied indicates that your browning citori was made in 1982.
You are furnishing an incomplete serial number. Citori is a model of Browning.
The RP that is found in the middle of your serial number indicates that your browning citori was made by browning in 1978.
No such serial number used in the Citori line.
On the receiver.
With the serial number suffix of S4,this indicates that your Browning Citori Lightning was made in Belgium for Browning in the year 1964.
You will have to call Browning to find out.
1988
It's a 2007 Citori Browning.
1989
You will have to call Browning. That model number is not published.
1985