I can't go check, because I sold it. Had to downsize due to arthritis in the neck. I now have a semi-auto 20 gauge Ithaca, but always thought the short barrel 12-gauge with 9 rounds was ideal.
I'm thinking it was single slide, but not certain. Very reliable, though. I spent plenty of time at the range, shooting reaction targets with slugs and 00 buckshot. Great fun, and never a hiccup.