Try a Mossberg Model 385K. This is what it was originally
Would need to know which model.
Proofhouse.com has a store brand chart that might help.
Model 58 is an automatic not a bolt action
The Mossberg model 185D bolt action shotgun was made from 1947-1959.
gunpartscorp.com/catalog/Products.aspx?catid=10889 The part number would be 67710B. The gun was a Western Auto gun and originally made by Mossberg.