Hello
It's my conviction that it's a Adam Cue.
Here in the club where i play we have a hold catalog of the Adam cues.
To give you the model it would help a full picture of the but, forget the shafts only the but.
At a first view, with the catalog on my side, i also have the opinion that it's an Adam 803.
The shafts aren't from the origin cue, and the signature... it's my believe that someone put it there.
I think there's a link with the old Adam cues, i'll try to find it and put it here, in order you take your own conclusions.
best regards
Francisco