I recently obtained this mitt and just finished cleaning it up today. It's an Olympan M27 Frank Hayes model. I'm not sure about the year, but it's probably from the late 1930s. There was a tag attached to it that said, "Glove was purchased from Frank Hayes Apr '52".
He was a 6x All-Star and played for Connie Mack's Philadelphia Athletics between 1933-42, 44-45. Frankie "Blimp" Hayes died in 1955 at the early age of 40. (WP - http://bit.ly/2nsTshs
| BR - http://bit.ly/2nsS2ni
I think it's a swell mitt.