Help with a clock?

OK, it's not a watch, unless it's a pretty massive wrist! I'm posting on behalf of my elderly mum.

She's found my grandparents old wall clock, possibly about 1930 or so. The clock has been in storage in the loft for at least 30 years. I've tried to wind it and the centre winder appears to be fully wound. The other two (I'm assuming for the chimes are free).

A couple of questions.

Is it likely to be broken?
If it is, is it worth repairing?









SD.