Need help identifying windscreen wiper system

Looks like a Bosch to me.  The holes-in-the-glass was used on some Steyrs and others in the 1930's.    Here is a link to some photos with a Steyr with the same wiper system:  

I posted a photo of a restored Steyr Type 55 that is missing its wipers, but has the holes in the windshield here: https://forum.studebakerdriversclub.com/forum/your-studebaker-forum/stove-huggers-the-non-studebaker-forum/110253-portland-art-museum?107731-Portland-Art-Museum=

Craig