iMac crystal oscillator / internal clock

Hello,

I am making a presentation about the use of crystal oscillators in computers. There is an image of the motherboard of an iMac (late 2009 model, 21.5"), you can see it here:

http://www.kodawarisan.com/k2009_03/images/102207.jpg

and here:

http://www.kodawarisan.com/k2009_03/images/102303.jpg (please ignore the red rectangle)

The oval-ish shaped, raised, silver colored component on the lower right of the images looks like an oscillator to me.

If that is indeed the oscillator, I was wondering if anyone can tell me specifically which oscillator it is? I would like to know the part number if possible (could it possibly be the HC-49?).

You can see more pictures of the iMac here:

http://www.kodawarisan.com/k2009_03/archives/2009/10/kodawarisanaeaa.html

Thank you to anyone who knows this.....

Jason