Read their website, which indicates over 50 years by the same staff for former owners (Bishops of Lawrence), and well more than 10 years current owners, starting in Salem, NH before moving to Haverhill. I have enjoyed their food starting about 48 years ago.
I don't have an exact number but I do know the owner operated at a different location prior to the current one. Easily 10+ years. It's authentic & tasty food.
Long time, good food, but service not the best
Not sure, more than 10 years!
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