Mystery solved! (And notice, Stanley Armour signs his name in A FONT)
Brush Script (narrow)?
And notice, Stanley Armour signs his name in A FONTMistral font family. Size 22. Rotated 27 degrees. Photo unfocus one pixel radius.
Mistral is a casual script typeface designed by Roger Excoffon for the Fonderie Olive type foundry, and released in 1953. The Amsterdam Type foundry released a version in 1955.
Yet Stanley used it as his signature in 1944.
Astonishingly prescient or possessing time travel capability.
Or a latter day forgery.