I think it’s a IC Big Muff. It does have the green board. It looks like the picture
but it has EH-3003 on the circuit.
The bypass switch wires are disconnected. The input and amp jacks look like
they have been tampered with. The stomp switch also looks bad, they look short?
as the switch is angled in the case. I have suspicions about the battery lead too.
Sorry, I do not have pictures or a camera.