Hi, thanks for all the responses. Was asleep.
This is the watch I have. This is the manual. When I press the top button. The 1/20 second hand (2 o clock dial) moves and the main second hand stops moving. When I press it again, the main second hand continues ticking. However, the bottom dial (chronograph second hand) continues to tick regardless. And after every minute, the 10 o clock (minute chronograph hand) ticks. I've tried like 10 different combinations but nothing stops the bottom dial from ticking.I can get to a point where I can move the 10 o'clock and 2 o'clock dial, but there's nothing I can do to touch the bottom dial. If I pull the crown out to C position, it works as it should - with nothing but the main hands moving. But I don't want to leave it out at that position.
I spent an hour tinkering with it and then gave up and decided to make a post here.