In my capacity as "technical librarian" I have a box of old dyeline prints from some of the original Baker drawings. Most of them are in rather poor shape so I have taken photos of them before they get totally unreadable. The one you want is rather big so if I shrunk it down to 800 pix I'm not sure it would be very legible but here's an attempt!
Geoff Harwood P21/30 Cygnus