FYI it is the PT 640 PRO (not the original PT 640) that Academy had for $289. I bought one Friday morning.
It has the polymer frame
Both original factory mags (it came with 2) are marked for the PT 640.
I tried it in my FOBUS SP11B holster that I use to carry my PT145 Millenium Pro, and it fits absolutely perfectly.
One difference not mentioned in the description of the PT640 PRO on the Brazilian Taurus website is that it has the licensed copy of the HEINIE "8" sights
instead of the three dot sites listed.
*
It also has the slide mounted lock, and came with 2 keys.
It has the SA/DA trigger, with the "second strike" capability.
It has the loaded chamber indicator that protrudes slightly on the right side of the slide, the same as the PT145 Millenium Pro.
Putting it side by side with my PT145 Millenium Pro it appears identical, other than the caliber (.40 vs .45), and the finish (blued vs my stainless PT145).
One of my shooting buddies has a PT140 Millenium Pro and I will compare the two, but I expect that they would be virtually identical.
When my POSSIBLY compatible magazines arrive from Cabela's (the factory original 24/7 Compact .40 11 round mags that are on sale 1/2 price),
I will post here whether or not they fit and function OK (Brazilian firearms blogs say that they are identical).
I will also see if my friend's PT140 mags work in the PT640 PRO.