The recent passing of Dieckman caused me to dig up this masse cue thread.
I don't have one of his.
But I do have a Jacoby masse cue.  It is the BRW version they used to make, not the "ebonized" maple one they sell now.  It's a good masse cue.
But recently I accidentally stumbled upon a seriously excellent masse cue.
It was advertised on Ebay as a jump cue, which was obviously incorrect.
The price came down and I grabbed it for about $40 IIRC.
I took it to the pool hall and let me tell you, I have no idea who made it, probably some guy in his garage, but this thing does masse like it speaks French.  LOL!  Hits like a truck.
14.5mm tip, brass ferrule.  Monster steel pin that goes God knows how far into the heavy as a train rail straight taper shaft.  The joint is thick, with a monster aluminum joint collar.  I have not weighed the cue yet.  But it is obviously heavy.
You can see at the end is a grooved ebony butt cap (yes, it is ebony), and aluminum ring, and a nice engraved MOP medallion in the end.  There are MOP dots with black dots in them and some purple-heart spears as well.  Lots of detail here.
It hits like a truck and does masse like nothing I have ever tried.  Whoever built this knew how to build a masse cue.
In the background is one of my antique double butterfly cues.