It's going to need a lot of careful cleaning. Would also like to see a full photo of it.
That's what I'm having trouble figuring out there only numbers on the side and a cpl of markings behind the rear sights no names no bore sizeRode hard and put away wet. Agree need a full pic plus do you have any info like caliber or manufacturer? Not sure there is much to salvage there.
Good advice. I can't see firing that again even if you knew the caliber.I would get a new gun and walk away from that one.