Hi Bill
Reminds me of a locally (Australian) made tent from the 60's.

It was made by an early "lightweight" and ,at the start , DIY guy called Paddy (Frank) Pallin .
(still an outdoor chain here but not making anything any longer)
It was made from a light cotton from England called Japara.
BTW, Paddy started in the early 30's and possibly was not aware of the Whelen Lean-to design
(he was too poor then to have High Speed Internet access...)

Franco