Seller: migomag7 (315) 100%, Location: South Morang, VIC, Ships to: AU, Item: 232565991103 Antique Vox Humana, Tremolo out of antique piano pump organ, collectable, prop.Unusual but interesting item out of Parkard Organ, from Fort Wayne USA.Organ dates back to pre 1900 and think the tremolo could even be older.The wording on side reads HENDRICK VOX HUMANA G.W.INGALLS & CO MFR'S WORCESTER MASSNote on one photo shows piece of leather at top of circular section, this has since taking photos has dislodged but can be glued back on. Also does show wear at spotsFrom from what l understand air was pumped into pump organ by the foot pedals and air made its way to the circular chamber of the tremolo which caused fin(s) inside to spin and causing the long exterior thin plywood propeller or flap to spin at a rapid rate. In turn this produced a humming effect and consequently added a nice finishing tone to music being played.It is a beautifully made object, interesting and has its own identification imprinted on it. Would make a great display and even serve as mystery object. Listed to be mailed but can also be picked up from South Morang.