Can't tell exactly- the Mossberg 385 bolt action shotgun was made from 1964-1983. After 83, it was made as the 385 K-A, and at an unknown later time, model changed to 385 K-B. In any event, a fairly recent manufacture.
33.3333333...%
31.75%
1825%
50%
16.8%
86%
20%
32%
It is 5%
It is 85%
95%