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Hi I need to find out what this sound is but I just can't figure it out. I know that it is not a;
-old credit card machine
-rotary telephone
-cassette player
-camera flash
-viewmaster
-abacus

It is apprently something old.
Any help would be appreciated...
http://s1298.beta.photobucket.com/user/secretsoun12/media/y_zpsdf3e5dc2.mp4.html

slide projector ? ... http://www.freesound.org/people/Timbre/sounds/172062

adding machine ? ... http://en.wikipedia.org/wiki/Mechanical_calculator

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If it's this secret sound ... http://mix97-3.com/and-the-mix-97-3-secret-sound-is/
carousel slide projector is a wrong guess :¬(