Help Identify Older IM Corinna Old Boy?

[Zartoon]

It has no tamper on the bottom

here it is compared to a standard pipe old boy. As you can see, the lift arm is different too. And has a straight flame. Any thoughts what it is?
It says I’m corona on it.

 

[Chasing Embers]

Probably just an older model, no older than 1981 though.

 

[Zartoon]

Is 1981 when IM corona started making these?

 

[Chasing Embers]

Is 1981 when IM corona started making these?

Yep.?