The arrival of this Chronograph now restored reminded me that some chronograph users are abusing their watches. DO NOT leave the watch for extended periods wound but stopped with the "top" button as this will prematurely age the mainspring.
Stopping it before carrying in luggage or sending it through the post is however probably a good idea as it may help protect the balance.
The Coventry made size 22 movement has 13 jewels and Geneva Gear and is an early one from 1879. The Case is by WG Hammond of Coventry.