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It looks like it may be a .38 Double-Action revolver, .38 S&W caliber, 3rd, 4th or 5th Model. There will be a s/n on the butt that would help narrow it down, including approximate date of manufacture.
edit:
I don't see a pinned front sight, so if that is the case it that may narrow it down to 5th model. About 15,000 of those were made from 1909 to ~1911.
It looks like it may be a .38 Double-Action revolver, .38 S&W caliber, 3rd, 4th or 5th Model. There will be a s/n on the butt that would help narrow it down, including approximate date of manufacture.
edit:
I don't see a pinned front sight, so if that is the case it that may narrow it down to 5th model. About 15,000 of those were made from 1909 to ~1911.