NOT AN EXPERT BY ANY MEANS!
The Lightning appears it is a Citori-however all of my reference says the Citori was introduced in 1988 in the Lighning series so the time frame is off compared to the barrel rollmarks, it very possibly is a Superposed as well model of which there are quite a few grades. The grades are going to be what determines the value. Finish, quality and extent of engraving, grade of wood define the grades.
One thing of note on yours-it appears from your pics that it has the original buttplate is in place, this is HUGE to a collector and brings a premium.
From your pics yours appears to be in outstanding shape. At one point in time Abercrombie and Fitch was a high end outdoors shop similar to LL Bean and such. More than likely your shotty is 60's vintage, serial # would tell for sure what vintage.
From the address on the barrel "St. Louis, Missouri and Montreal PQ" it is 1959-1968 era.
I cannot find any reference to Abercrombie and Fitch in my Fjestad Blue Book.
Worth a drive or call to here to find out exactly what you have: http://www.mwreynolds.com/
Sure looks to be a nice shotgun.