[Dewey29]

I'm in the process of restoring the convertible top on my 29 roadster and the #2 #3 bow is in good condition but the front bow has rotted beyond repair. I'm planning to make a new front bow but need help with 2 questions, 1) what type wood was used? 2) was the front bow curved at all? My old bow has an upward crown and I've noticed some examples I found online look straight from side to side and bow out toward the front. Do original drawings exist? Any help will be greatly appreciated. Thanks!