Replacing new Craftsman middle chest lock to matching set. How do I remove old lock?

[laser bones]

Trying to replace my brand new Craftsman middle chest lock with a matching set. I've never seen the back of a craftsman lock that looks like this, usually it's just a concaved c-clip. How do I get this lock off? Is this a new lock they're using? Thank you if you can help!

http://imgur.com/a/x1spr

 

[gdocktor3]

I'm just guessing here, but I'd start with the c clip towards the rear which looks like is holding that ring in place which may be threaded on. Then you can see the clip towards the front with the tab bent over. I'm thinking you bend that tab back and you should be able to spin the entire mechanism and pull it out from the front or something. The lock smith is coming into my work today. I'll ask him if no one else comments.

 

[camd64]

Looks to me if you squeeze the two black tabs in (towards the center of the lock) it should just slide right out.

 

[laser bones]

Looks to me if you squeeze the two black tabs in (towards the center of the lock) it should just slide right out.

That was it!