The photo I have is of Frederick William (or "Fritz") as a young man, playing the clarinet in a country band called the Gretsea Harmonie Orchestra. Other members of the band are a sister and brother. It's a charming bit of folk history from a book on Tama County history. I can scan it and e-mail it to you.
I also have a descendant tree from Vencil Hrabak, the GF of Fritz, but I'll contact you privately about that.