Looking to obtain items relating to the issue of the 1990 150th Penny Black Anniversary stamps, in particular Royal Mail promotional material (eg A4 posters in Welsh, European and Japanese version), windows and vending booklets packaging materials (wrappers and packet labels), supermarket product pa...

Many thanks

Can anyone advise reference information for booklet packaging for wrappers, packet and parcel labels? (WB, PL, RL references etc..) trying to find a consolidated listing particularly for window booklets and 50p & £1 vending booklets