Harp Gear HGII
The rival of the Marble Max from the US, placed at my disposal by Martin from Vienna.
Very nicely processed, a little more generous cut, here a stable aluminum chassis with front panel.
The circuit is also a Champ version - somewhere between 5E1 and 5F1 with tone control that works similar as with a guitar. Simple but very effective. This design is and was very common in the DIY area, even before the Harpgear. The Weber Alnico is undoubtedly one of the best 8" for harp.