Hello,
I believe you may have a Mike Erwin sneaky pete. Mike was a former shop foreman at Meucci cues for many years, then went on to build custom cues with his son Scott. Mike passed away in October, 2012, but his son continues to build fine cues. I have a Mike Erwin sneaky pete, and it is signed between the points, with the initials, "ME." As one other member pointed out, Madison Bob may have made your cue. He was known to commonly use both a radial and 3/8 x 10 pin, whereas Micke Erwin used 5/16 x 18, as well as 3/8 x 10 joints. I'd have to see a picture of your cue to know definitively. I hope this helps.