Which Breeds Lay speckled eggs?

[Cinderblock]

One of my new laying hens laid a speckled egg. I have no idea who laid it, but would love to know. Here is a list of the breeds I have that haven’t laid yet or I haven’t been able to identify their eggs:
Black Australorpe
Light Brahma
Speckled Sussex
Blue laced red Wyandotte
Buff Orpington
Salmon Faverolles
RIR
And a mixed breed that is black with gold lacing. Any idea who could or could not have laid it?

 

[Dottie the Chicken]

Maybe whoever laid it just hasn't gotten her "sprayer" figured out yet? Are they pullets, or just new to you hens?

 

[NatJ]

It could be any bird on your list. She might keep laying speckled eggs, or it might be a one-time thing as her body gets used to making eggs.