What time is it? Watches and horology

i have one of these and its missing a screw out of one of the links. does anybody know off hand who i could turn to please? thanks.

ps. i'm not married and its not my hand (just in case you were curious as to my availability)

Alsal watches would get my vote, they normally seem to be able to help with the basics and are a safe pair of hands.

Does anybody have any recommendations for a service to replace crystals? I'd like to replace the crystal in the Seiko that I dropped yesterday, have a 1960s childrens watch of unknown make that I'd like to fit a new crystal to and was thinking about getting a domed crystal fitted to my Helson Sharkdiver if possible.