Thank you for the point, considering I didn't fully answer the question. None of the numerous web references seemed to indicate the make, let alone the model.
The radiator is very much ahead of the wheels in the photos, which makes me think it might be older than a Model 16, possibly a Model F. In addition, cars were still an expensive commodity at that time - I reckon Mr. Repp would have used an older car to experiment on, rather than the latest model.
Anyhow, an interesting puzzle.