Need Help Identifying Propeller Markings Marblehead, MA

[Robert Loughlin]

Hello Forum! This wooden propeller was found in an attic in Marblehead, MA. There is a rich history of aviation manufacturing in Marblehead. The propeller is 80" +/-. Please see photos of the markings. I would greatly appreciate any help if someone were familiar with these markings. Please see photos. Thank you!!