Waterfall Keyboard? What is that?

[VintageIorio]

I was looking at an old Lyric PA on eBay. It will probably sell for under $100 as it is a restoration project. The seller says it has a waterfall keyboard and I dont know what that means. Ive also seen the term before but it seemed to have something to do with organs. Can anyone explain what it means?
Here is the link to the project accordion:

http://www.ebay.com/itm/331106344129?ssPageName=STRK:MEBIDX:IT&_trksid=p3984.m1431.l2649

Thanks!

--Loren

 

[Soulsaver]

See here.. http://www.dairiki.org/HammondWiki/WaterfallKeys

 

[pentaprism]

I found this: waterfall keys

 

[VintageIorio]

Thanks! I get it now. Just more rounded smoother edges. Thanks for your help!

 

[Soulsaver]

BTW Note: Contrary to the listing description, they don't look like waterfall keys in the link...?

 

[goldtopia]

Maybe it means playing outside in torrential rain. Playing I'm forever blowing bubbles.