Nice find Luke!
Not new, but I am including another example of a Cobb bat on.
Here is the updated list:
(All are factory 30 unless noted)
- Ames (port) - Factory 25 and Factory 30
- Beaumont
- Clarke, Fred (port)
- Clarke, JJ
- Cobb (bat on)
- Dahlen (Brooklyn)
- Dooin
- Durham
- Gilbert
- Griffith (port)
- Hemphill
- Johnson (port)
- Jones, Fielder (port)
- Keeler (with bat)
- Killian (pitching)
- Mathewson (port)
- McGraw (port no cap)
- Merkle (port)
- Overall (port)
- Seymour (batting)
- Shipke
- Spade
- Steinfeldt (port)
- Stovall
- Tannehill ("L" on front-Chi.)
- Wagner (bat left)
Other back marks:
- Rhoades (loop on the right)
- Owen (splash? on the bottom)