Got another 3 key photos that fit with what you are all saying.

The good: The barrel is intact.
Attachment 104627
The great: Looks like a No4 Mk1. And on the next picture the good is you can see the bolt release.
Attachment 104626
The very bad: The charger bridge was cut off.
Attachment 104628
$125 was the price...so close. What a tragedy. No way to fix that receiver?
Any advice?

thanks all