If it looks "generally crude" and "old" at the same time, and looks at least vaguely like an American design, bet on a pre-WW2 Spanish critter. Tons of that crap made it's way in. They were junk when new and haven't improved with age. They were the "Taurus/Rossi/Armscor" of their day but nowhere near as well made as any of those.
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Jim March
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