Ican't remember
 

Hi guys,
I'm trying to remember the name of a soul band of the 70s (I think).
I had the album at that time but the only things left are some pictures in my memory.
It was a double cover, all black with an egg falling from one end to another on the cover.
Inside, showed a kitchen with eggs sprawled on the checkered floor.
The band had many metals and the singer a hoarse voice.
So, has anyone seen this?
Can you tell me what the name of the band?
Thank you , Caetano