A striking advert for SunTour’s 888 Wide pull chain derailleur. The model depicted is the item in this collection that I have called SunTour 888 Wide (4th style).
The freewheels depicted do not use the removal tool that I am familiar with from 1970s Perfect and Winner freewheels. The widest ratio 5 speed freewheel seems to be a 14 to 26 teeth.
Browse associated derailleurs.