RE: Need info on this pump shotgun
I believe the "E" desigantes the year is as made. "E" would be 1953 I think. They're decent little guns but they don't have a lot of actual market value - $135- $200 I'd say. As a family gun however, the value shouldn't be the important factor.
While it looks to have a crack on the stock, get it repaired or replaced (keep the original) and shoot it so long as it's functionally in proper order.