This is a nice example of the highly desirable “panda” dial (white with black registers) Hamilton Chrono-Matic from the 1960s. This example is in nice vintage condition. The case appears unpolished and thick. The dial shows some age consistent with wear, but is overall very well preserved. The lume on the dial and hands is original, with only a few of the plots on the dial showing some loss. The winding crown is a replacement, and unsigned.
For an excellent write-up on these stellar watches, head over to Fratello Watches here.