SPY HINTS (SERIES 1)
SPY HINTS (SERIES 2)
Badges and stickers
The last special offer from Trebor was the iron-on transfer and sticker kit. This advertisment appeared in Hulk Comic in August 1979.*
Here is an image of the stickers, magnified and rotated from the above advertisment.
The following is another advertisment from Hulk comic in September 1979:
* Thanks to Darren Stephens for supplying scans of these advertisments