Hi Doug:
It has been a while since I flew several of these types but do you remember if:
Tiger Moth...did it not have a front wooden spar?
Chipmunk ...I know it was first produced with a front
wooden spar and the rear half of the wing
was fabric. Fuel guages in wing caps.
DHC-1 "Chipmunk"...metal spars and all metal wings
Fleet 80 "Canuck"...I am sure they had wooden spars
and were fabric covered...not sure if they
put a metal spar in or not later.
Cheers...Happy Landings...Doug