Mossberg
Coast to Coast shotguns was a store brand marketed by the Coast to Coast hardware store chain. They were made by Mossberg, Stevens, Savage, and Springfield.
Coast to Coast was a store chain. Several companies made firearms for them, and marked them with the Coast to Coast name. Among others, Marlin and Savage made a lot of their guns. If you have a model number, we may be able to narrow it down a bit.
Mossberg.
savige
It was made by Savage for Coast to Coast. It is a Savage Model 58.
If it is a Mossberg, it was made by Mossberg. They did make guns for a number of "store brands".
savage made this model,orig model is a 77
Proofhouse.com has a store brand chart
They were manufactured by Savage.
1962-78.
To the best of my knowledge (and I was once told) The coast to coast shotguns were made by Mossberg. Master-mag is the coast to cast house name brand. The evidence I see that Mossberg was the manufacturer it the thumb slide safety.