The Annual Egg year 2007 Cloud Tern's Egg by Toikka.
The egg is numbered 493/750. It has insignificant wear on the underside. The vertical blue line seen looking at the picture on the left hand side within the "eye" of the egg is a reflexion within a vertical tension crack within the glass. This looks like it can have arised already at manufacturing.
The price of this egg is reduced.
On the last pictures you see the egg together with the annual bird of 2007, the Cloud Tern.