This is a detail from a photo of a Mustang artilleryman as an officer in the 1930's. I'm thinking that this is the 107th Artillery when it was part of the PA National Guard prior to it's disestablishment.
Question: The US collar brass, what are the letters on top? PNG? Something else? Is this the 107th Artillery Regiment of the 28th Division (PANG)? WWI Victory ribbon with 2 stars?