1970 Cuda K frame

How do I identify a 70 Cuda K frame? Any pictures of the coin out there? is it oval or round? Any numbers I can look for?

Oval with 12 stamped.

Thanks for the info Picked it up with a set of upper and lower control arms a sway bar, hubs, tie rod end and steering gear box for $300

12 on the coin...Translates to E-body part #2962012...1970 early, 318,340,383 engines...Nice score...Looks like the coin is on the left{drvers} side correct ??? Opposite side compared to the one in Ola's pic ???

Wish I knew someone needed one. I got one cheap with arms and hubs,a few other things. sold the box. But I would think shipping would be a lot from the gulf coast.