This Portative Organ is made with open organ pipes that are tuned with a zinc tuning tab at the top. Portative Organs made with this kind of pipe give the more standard "Diapason" Tone, heard on the majority of portatives today. This organ can be made with stopped pipes as well, if a more mellow, fluty tone is desired.
The range of this Portative Organ is from 2 foot C to g, 32 notes . If it is made with Stopped pipes, then it would be a deeper 4 Foot Pitch. The following video demonstrates this Portative Organ with open pipes in 2 foot pitch.