RC Royal Calendar G.p.o. Box NO Karachi Pakistan Lithograph print I think

I believe this is a lithograph print. The mark on the rear seem to be a P.O. box number Help with Id. The measurements are 18 X 12.
Print Number 2 Mushrooms What type of print is it?
print # 3 butterflies has tiny dot seen through a loupe

 

No pictures?

 

a dot like this one ' . '

 

A regular pattern of dots indicates a photo-mechanical print - offset lithography. This is what you might expect for a calendar illustration.

 

Can't see answering this one...

 

What type of print is it?

Invisible....

 

Sorry I forgot to post the special glasses needed to view this print. Now that everyone has them here is the print. Oh buy the way what is the best size or largest size that can be uploaded? this print shows thousands of small colored dot when view with a loupe. I have several different prints to upload now that my lap top has been restored to better health. I am fasinated with all the different processes use to create prints of art works.
Thanks Everyone

 

a mechanical offset lithograph fits the description of this print.