Armstrong QCTH help!

[sped35]

Good evening everyone!
I need some help figuring out the size of a QCTP tool holder I got in a group of parts. It is a Armstrong 81-023. From some measuring I have done, I think it is a BXA size. By the part number, can someone help me confirm this?
Thank you!!!

 

[darkzero]

From what I Googled, says that holder is for the 81-011 tool post which is BXA size.

 

[sped35]

I have found varying results in my the online searches. Was hoping someone here has a holder like mine and could give me a definite reply.
Thanks for the reply!