Nice looking amp David, and well worth the trip to regain it. I'd love to draw up the schematic and add it to the collection, we don't have one of those yet as far as I know. It certainly seems a bit diferent from my GRO 100. I'll see how well I can zoom in on those photos of yours to try and spot t...

From the outside it looks identical to my No. 842 which I drew up the schematics for 10 years ago and posted on the orange field guide. the only difference I noticed is that mine has the model written as GRO 100/2, it would interest me to know whether your FAC is straight from the input like the oth...