Ian Grant
Subscriber
It is an abbreviation for special. Turns up from time to time in the book. What makes the camera(s) special isn't spelled out. The book is very terse.
Thanks Dan, I assumed that was probably the case but wanted it clarified.
So we a have a camera here that's non standard and an entry for the same serial number that's one of six "special" as in non Standard Speed Graphics. Maybe more than a co-incidence

Then a non standard camera from Speed Graphic parts *except for the shutter) which isn't in any of the Graflex catalogues so has no model name could well be a Spec. Speed graphic.
Ian