Is this what I think it is??

[treetiger]

I'm going out on a limb here but-- is this a Christensen '9 & tail'? If so, then it is my first one in my pile!  It is 5/8". Any help with this blue beauty would be much appreciated. 

[Tommy]

Could be ...

[treetiger]

6 minutes ago, Tommy said:

Could be ...

Thank you Tommy😃😉

[akroorka]

MFC?? Probably not imho.
The color is rare from all makers. CAC, Akro, and Peltier as well.
That big cut mark in image’s two and ten shy’s me away from it being a hand-gathered slag.
This one may be an Akro—
I appreciate all opinions and respect them all.
More are needed for sure
Marble—On!!
 

[treetiger]

25 minutes ago, akroorka said:

MFC?? Probably not imho.
The color is rare from all makers. CAC, Akro, and Peltier as well.
That big cut mark in image’s two and ten shy’s me away from it being a hand-gathered slag.
This one may be an Akro—
I appreciate all opinions and respect them all.
More are needed for sure
Marble—On!!
 

Thank you Akroorka. I thought it might be M.F.C.; but I re-watched some videos on slag I.D.'s on YouTube and figured that it fit better with C.A.C. I edited the original statement to reflect that. Thank you for your input. Still a mystery😉😊