[Low-Tech] Musical Instruments: Water & Pipe Organ?

[vicky_molokh]

Greetings, all!

I'm trying to find data on medieval-ish Pipe Organs, the ancient Hydraulos / Water Organs, and related instruments. Web-searching seems to produce general descriptions. But I'm looking at data in the more GURPS-y style: variant items with cost, size/mass and typical sound volume.

I realise that e.g. church organs were probably not sold on the open market, but a price in GURP$ for the purposes of calculating crafting time/effort/etc. would be just as useful.

Thanks in advance!