Both wings were essentially rectangular in plan and built around pairs of spruce box-spars, with plywood leading edges and fabric covering elsewhere.

[3] The fin was built into the fuselage structure; early photographs, taken before the H.1's registration, show the original profile of the vertical tail was trapezoidal and again very like that of the Carley C.12.

It was later redesigned; images recorded after its registration as H-NACD in the summer of 1924 show a roughly quadrantal fin with a pointed, vertically-edged rudder.

The axle was mounted via bungee shock absorbers to short vertical legs with and rearward drag struts, both attached to the lower fuselage longerons.

[1] At the beginning of May VIH entered the C.12a and the H.1 into the Tour de France contest, which was to be held between 24 July and 10 August, starting and finishing in Paris.

[1] On 11 July the single seat Holland H.2, a development of the C.12a with a new fuselage and a vertical tail revision like that made to the H.1, took its first flight and VIH decided to enter it, rather than the H.1, in the Tour.