Based on the seller's photos, I don't think so. The rear element does not protrude. That and the IR index sort of seals it. So, it looks like you did not get a killer deal. OTOH, it does look to be a VERY clean ST 50/1.4 with front/rear caps at a decent price point. I would contact the seller and suggest a partial refund of $50.
See this MF lens forum post for comparison photos:
http://forum.mflenses.com/hybrid-3rd-version-of-super-takumar-f1-4-50mm-t55617.html
Steve
---------- Post added 03-14-14 at 08:18 PM ----------
Originally posted by BigJPR Following.
Mines has the red marker right there, but it also has the "manual-auto" markings so what is it? Didn't know about the different flavors of this lens, please edumecate me! lol
According to your sig, you have the S-M-C Tak 50/1.4, all of which were 7 element lenses.
Steve