ThanksLes,

yes,......the seat back is really so low, this is the seat of a French Demoiselle from 1909.

But don't worry, in the pioneer days there was many different seat models.

Usually, the materials were combined, .....there was versions with rattan / plywood as well as rattan / steel pipe.

The heights and widths were also different, even the German Fokker seats were in mixed construction.
I have built any full size seats for our ww1 machine, I could send you something by mail if you're interested.

greetings Gabriel