An original production used blueprint for 'Ext. Section of Wing Tip (Recovery Appliance)'.
This blueprint would have been referenced by various departments on the production but primarily the model department.
Dated 11/4/83, drawn by Gary Tomkins, the blueprint features Wing Tip detail to include 'position of Zeroid'.
Terrahawks was Gerry Anderson's (Thunderbirds, etc.) last television series to use puppets.
A wonderful piece of Anderson history which would look great suitably framed.