Think it was over wound.
Oftentimes, iffen you can "nudge" the escapement wheel to get it moving ..... and keep repeating said, it will begin to work.
Iffen it runs "longer" after each "nudgeing" ..... then you are making progress.
A "squirt" of lighter fluid on the gears and bearings might also help. The lighter fluid will "cut" the
varnish build-up on the bearings and shafts of the gears.