looking for inf on 40ER Edd Roush bat

[RMorris]

Hi, I have an Edd Roush 40ER bat and I am trying to determine if it is a store model or a pro model bat. The bat is 34", weighs 41 ounces, and was made between 1916-1931 by the Keyman Collectible bat dating guide. This thing is a beast when u pick it up. There are numerous spike marks on the barrel. On the bottom of the knob is 34" from the factory and an A carved above the 34". This bat appears to be the right length and weight to be a game model. I could not find any info to tell me if Roush ever used a 40ER as a game bat or if an A was ever used as some kind of ID on his bats. I would also greatly appreciate a value if possible. thanks in advance for any info provided.

[MGHPro]

40er and inch marks on the knob let you know it's store model