Yep, it's a upd6376. The basic laser and servo system are same between 50 and 150. To be an ordinary CD player, use upd6376; to be a superior one, use ad1868.
Kaosun, do you know anything about Panasonic SL-NP3 player? How it compares to Technics SL-XP5(7). Or is it the same thing? It is not listed in your Components table. Thanks!!
Attached is my take at this table, I have no means of uploading it here so I put it at my (basically nonexistent) site. Here is the link: http://square-2.com/category/audiophile/