Since 1973 The Post Office Has Produced Various Sets Of Picture Cards - Essentially For Use As Postcards - Each Card Shows An Enlarged Colour Reproduction Of A British Stamp. They Are Referred To As ' Phq ' Cards By The Post Office And Each Has A Unique Reference Number.

Ref: PHQ 100

A Beautiful Set Of 4 Postcards Which Was Issued By ' The U.k. Post Office On The 24 March 1987 ' To Commemorate : ' 300th Anniversary Of The Pricipia Mathematica By Sir Isaac Newton '

Cards Feature: A) The Mathematical Principles Of Natural Philosophy B) Motion Of Bodies In Ellipses C) Optics D) The System Of The World

Issued By: The U.K. Post Office

Issue Date: 24 March 1987

Card Sizes: : 5.875 X 4.125 inches

An ideal gift for any card collector, historical or nostalgic memorabilia collector or maybe even a present for yourself.