Need some help locating Joe Dawson signature
 

Hello all, I remain in the market for an elusive Joe Dawson signature in order to complete my 1927 Pirates project. If you know of one, have one, or can provide any direction for me, please, please, please, please email me at mschwade@gmail.com.

Trying to do some research, I found that this ball was sold in Sotheby's auction in 2006... The description says that Joe Dawson (a.k.a. Ralph or R.F.) was present on this baseball. Can anyone point out where it is? I can't find it even with the process of elimination. Thanks.

http://www.liveauctioneers.com/item/2110463

http://p2.la-img.com/246/9797/2110463_1_l.jpg

Players present on this baseball:

Lou Gehrig
Miller Huggins
Tony Lazzeri
Urban Shocker
Joe Dugan
Waite Hoyt
Mark Koenig
Bob Meusel
Ben Paschal

KiKi Cuyler
Joe Cronin
Pie Traynor
Lloyd Waner
Paul Waner
Manager Donie Bush
Chic Frazer
Vic Aldridge
Clyde Barnett
Fred Brickell
Mike Cvengros
Joe Dawson
Johnny Gooch
George Grantham
Heine Groh
Joe Harris
Carmen Hill
Ray Kremer
Lee Meadows
Johnny Miljus
Hal Rhyne
Earl Smith
Roy Spencer
Glenn Wright
Emil Yde
Oscar Stanage (coach)
Bill Hinchman (coach)

Thanks!
Matt