Album pages common designs - 2b. 1978 25th anniversary of the Coronation

Some remarks on the printings of the 'House of Questa'...

One 'commom' item on all sheetlets, is the name of the printing company : 'The House of Questa'.
This 'house of Questa', printed stamps from 1966 till 2002, mainly for countries that resort under the British Commenwealth.

In case of the 25th anniversary of the Coronation, the full name 'The House of Questa' is mentioned on all sheetles, in exactly the same spot.
All issues were clearly printed in the same company, located near London. 

The House of Questa

Many other issues were printed by that company, some bare the name and a logo of a Q-shaped balloon, some mention only 'Questa'.

In the printing below, we find the printer colour marks Cyan Yellow Magenta Black and Grey in the same 'balloon' style. In the margin above we also see "QCSPL" : Questa Colour Security Printing Limited.

As it is a private company that printed many stamps (also some doubtful issues and cinderellas), many questions rise on the validity of some printings. 
Not only may the stamps have been printed in quantities that exceed the actual ordered amounts, also questionable print errors, test printings, or suspicious overprints are circulating.

The history of the House of Questa, and the Format International Security Printers, is a topic worth reading. Hereby I like to refer to the following site : House of Questa - Format International 

Some caution in buying expensive proofs, errors, ... from Questa's printings is therefore recommended.
This also counts for the numerous emissions of the 'Leaders of the World' - trains and cars.
All 'issued' by small entities as Tuvalu, Nevis, Grenada, .... and their islands.
The 'Bernera / Davaar' issues are purely private emissions, issued by this company

Bernera Islands

Davaar Island

to be continued...