A watch, which gains uniformly, is 2 min, slow at noon on Saturday, and is 4 min 48 seconds fast at 3 p.m on the following Sunday when was it correct?

From Sunday noon to the following Sunday at 2 p.m. there are 7 days 2 hours or 170 hours. The watch gains 2 + 4⁴/₅ min in 170 hrs. Therefor, the watch gains 2 min in 2 x 170 hrs i.e., 50 hours 6⁴/₅. Now 50 hours Sunday noon = 2 p.m on Tuesday.