Vintage Silent Night Swiss Musical Door Chime Christmas Season Pull String NIB

Vintage brand new in box Silent Night Musical Door Chime Music Box.   We at first thought this did not work and as string was hard to pull and we did not want to damage it, but after unwinding a bit of the spool of thread, and laying it flat it works like magic-the music started and wound itself up.  Beautiful sound, but needs some tweaking to work as intended.  (of course we did not read the enclosed instructions so we may have been doing it wrong).   Box shows minor shelf wear as expected.