…a Vistascreen 3D viewer and cards

These cheap plastic 3D viewers became popular in the late 1950’s. This one, which was purchased in September 1960, was linked to Weetabix cereal, and could be purchased by sending one shilling and sixpence and a voucher attached to a cereal packet. Every packet of cereal contained one of the twenty-five cards in each series, which included “Animal Cards”, “Our Pets”, “Working Dogs” and “British Cars”. 

For further information on the 3D viewers, consult Wikipedia:  

https://en.wikipedia.org/wiki/VistaScreen