Even upside down I can tell that's a Brother made machine. Coronado was the name Gambles Dept. Store used on thier appliances and household goods. The sewing machines were made by National up to 1954, then for years by Brother, but I've also seen a few Japanese Coronados that were not built by Brother. If you need a manual look for a Brother Project 651, same machine. I'll even wager a guess that it's a left needle machine.
Cari