The year 2014 marked the 50th anniversary of the first year of operation of the Germany & Colonies Philatelic Society following the amalgamation of the Germany & Colonies Stamp Club (established 1947) and the Stockton German Study Group (1960).
The G&CPS celebrated its inaugural year in 1964 with the first Germania Posta philatelic exhibition held in Stockton.
I came across this stamp in a collection I bought a few years ago. The stamp on the left has grey/black shading on the forehead versus the normal white forehead on the right stamp. Wondering if this is a known color error. Thank You