From the 1940 and 1941 Sheaffer dated catalogs, I found that the Skyboy model was noted as new in the 8/1/40 catalog which said it was "developed particularly for the hardest of pen ordeals, aviation use." Offered for $10 ($8.75 for the slimmer Lady Skyboy) as a lever filler only in Black, Golden Brown, Gray Pearl, Marine Green, and Carmine. The clip was the standard clip but engraved with "SKYBOY".
In the 8/1/41, catalog, the Skyboy has acquired the over the top clip designed for men in uniform. The catalog mentions "Flo-Rite" fluid control and I wonder if there was really anything different in this model or if this was just marketing. Still only a lever filler, colors were reduced to Black, Golden Brown, and Carmine. There was no longer any mention of a Lady Skyboy.
As can be seen above, my Skyboy's Lifetime nib is marked 14K. When did Sheaffer start that marking and is this an orignal nib or a replacement?
I'd like to see some other colors, the regular clip, and a Lady Skyboy if you have one.