vintage LCD necklace watch pendant Astrosonic gold tone

I just replaced 392 cell battery so it is working, but I cant figure out how to reset the time. 15” dainty gold tone chain beautiful vintage piece with a few minor characters flaws: clasp works but is a little sticky there is a small crack on the front there is a small dent in the back bought in an estate auction with a lot of vintage watches, so check my profile for more. I have a bunch listed and many more to list.