I just git a Kamaka hf3a with two string courses on the second and fourth. Does anyone know the story on this? Sorry, it is an HF 36 A. It had octave E and G strings but the high E second broke.
It would help if you could post photos or provide a link to photos. It's easier for the Kamaka experts here to answer questions like this if they can see the instrument, including the label inside the soundhole.