Thank you for your post. Yes that's how i understand the chrono should function.
Unfortunately nothing will get the 1/10 sec indicator hand moving. My local watch repair specialist thinks it is a problem with the 'A' button and im tempted to agree as sometimes it takes 3 or 4 pushes of 'A' to start or stop the chrono.
The watch repair guy is going to take a closer look and then supply me with a quote to put it right.
Will update when i have more news and i will be sure to add photsos when its all sorted out.