Service of vintage ultra-thin dress watch

[jscom]

I am considering the purchase of this vintage ultra-thin AP dress watch from the 1960’s, which I think normally comes with the calibre 2003.

A bit small, but beautiful.

My concern is that I read somewhere that these ultra-thin movements are fragile and that parts are almost impossible to find today.

So would it be reasonable to purchase this watch as a daily wearer? Will service be an issue and make it an overly risky and expensive choice on the long term?

Many thanks for your advice