You will have to contact Mossberg to find out.
The Revelation 220B cross references to a Mossberg 800B. Unfortunately, the rifle has been out of production for some time, and the usual sources of parts are empty. You may check with Havlin Sales through their website- Mr. Victor Havlin is one of the best sources of parts and info for Mossbergs, and he and his wife Cheryl run the Mossberg Collectors Assoc. Good luck-
The Savage model 220 series of shotguns were made from 1938-1965.This includes the model 220,220b,220p,220ac,and 220L.
The value of a Stevens Savage Mod 220b 16 gauge single shot shotgun is between $200 and $500. The actual value varies greatly based on its overall condition.
The Production Budget for Another Year was $8,000,000.
The Production Budget for The Big Year was $41,000,000.
The Production Budget for A Good Year was $35,000,000.
The Production Budget for Man of the Year was $20,000,000.
The Production Budget for Battle of the Year was $20,000,000.
The Production Budget for Leap Year was $19,000,000.
the last year it was made was 2004 production year
1959 was the first year of production.