Speckled egg

[Gillibean0115]

This morning I found a speckled egg and I'm not sure which one of my girls layed it. My options are my Easter Egger (she is 11 months old), my Rhode island Red (she is 11 months),my Buff Orpington (she is 11 months), or my three ausralorps (they are 18 weeks old and just started laying about a week ago). Any and all help appreciated.

 

[Gillibean0115]

Here is a picture

 

[Messipaw]

It's a pretty egg. Don't be concerned about the speckles. That happenes sometimes. This egg color looks like my RIRs eggs.