1920's early motorcyle model question

Hi,
I am preparing to repro this style - which is claimed to be 20's British, although it highly resembles German style of the same era. However, I can only find 1 front photo. Any input of the following are welcomed:
1) the 2nd pic is my best guess about the layout of the back - any idea of the correct back pattern ?
2) Do you think there should be an internal, hidden elastic sleeves cuff - a study of similar german style showed none.