I've been a fan of this phaser ever since I saw it in ST III. I think it's one of the best phaser designs we've seen in Trek. Since ST III it's made many appearance in Star Trek including ST: Generations, ST: DS9 and ST: TNG (at least two episodes). This replica is based on the one seen in the TNG episode "Final Mission".
The main differences between the ST III phaser and this are the lighter color, leather (suede) wrapped handle, silver trim around the P1, and the white gunk that's stuck in some of the crevices.
This is the picture of the phaser when it was auctioned off. (all pics are clickable thumbs)
It can also be seen HERE
Screen shots from "Final Mission":
Pics of my replica:
Thanks for looking!