Not sure if Aerometric sit under British or Parker, so Parker it is...
I recently won by auction a Parker 51 Aerometric Forest Green but on receipt it turned out to be a Blue in colour with the barrel imprint of MADE IN ENGLAND 0, so take that to be dated 1950. Having only seen photos of a Midnight Blue, my pen looks quite a bit lighter in colour to what I imagined a Midnight Blue would look like.
So my question is - Did Parker produce an additional/later 'Blue' variant to the Midnight Blue? The photo below is the Blue pen against a Teal Blue 51.
Thanks
Innes