Autograph ball by umpire - info help needed

[Dennis K]

Attached are various photos of a baseball I purchased at a sale about 7 years ago. The sale was at an auction house where the auctioneer would bring unsold items from an estate sale to his auction house and sell in box lots. I purchased 2 signed baseballs and this one was one of the two signed balls.
These autographs appear to be all autographs by baseball umpires. Would anyone know where all these umpires would have been meeting for someone to get this many signatures?? Any idea of a value?

I tried to make out the autographs and came up with these, there are likely more on the ball but I do not know who they are.
Baseball of NL & AL Umpires
L. Young
Wm. Haller
T. McClelland
L. McCoy
M. Hirschbeck
E. Gregg
D. Harvey - HOF
D. Morrison
B. Froemming
G. Crawford
R. Garcia
G. Davis
E. Montague NL 12 #11
J. Layne #24
R. Marsh #30
J. Hirschbeck #17
T. Hendry #35
S. Palermo #14
D. Scott
H. Wendelstedt
J. Brinkman
G. Bonin
J. McKean
M. Winters
V. Voltaggio
J. Joyce
S. Rippley
D. Rennert #16
A. Clark
T. Conney
D. Denkinger AL Umpire #11
D. Coble #3
D. Ford
J. West NL 22
D. Phillips
L. Barnett
G. Kosc
T. Welke
R. Reed
F. Pulli