Posted By:
RhysI once owned a Spalding guide signed twice by Tim Murnane from his estate but unless someone was signing it to identify ownership (usually on the first two pages) I have never seen another signed Spalding guide. The signature is not that of 1910's player Elmer Koestner and nobody else with that last name ever played major league ball that I can find so I would guess it was just the guy who owned the book. Value is neither added or depreciated from the signature in my opinion. An 1893 Spalding guide in that shape is somewhere between $100-$250.
Rhys