Estey reed organ (Kontakt full or Kontakt player):
http://www.soniccouture.com/en/products/28-rare-and-experimental/g57-estey-reed-organ/
Windows 7 or higher (latest Service Pack, 32/64 Bit), Intel Core Duo or AMD AthlonTM 64 X2, 4 GB RAM (6 GB RAM recommended)
Mac: OS X 10.9 or higher, Intel Core 2 Duo, 4 GB RAM
Requires KONTAKT 5 or KONTAKT 5 PLAYER version 5.5 or later
1.68 GB
Enjoy!