E.N. Welch parlor clock- wound too tight, will not work

by Anita
(Brisbane, Australia)

Hi, I have bought a E.N. Welch parlor clock off ebay from a clock company in the USA, it arrived yesterday in Australia.

I have found the right key hole is very tight and do not want to force it and break it(maybe over wound), the left key hole is fine and wound it up no problem.

The clock will run for maybe a minute or two then stops, any suggestion are welcome.It has been cleaned and oiled, and is level. Also do you have any idea how old this is (photo's attached).
Many thanks in advance.
Kind Regards,
Anita