Can a BELSTAFF expert tell me more about this jacket? (Authentic? Era? Etc!)

Hello all! As you can see my post count is sort of low so I apologize if this thread is in the wrong place or something. I searched for other Belstaff threads before making this one, but non seemed quite relevant.

Ive been searching for a nice looking old Trialmaster that wasnt WAY out of my (admittedly "small potatoes") price range and in the process I stumbled across this. Now, I'm clearly no expert so please forgive me but can anyone tell me anything about this jacket? Of course the seller says its 100% authentic, but has no information about vintage (though the pic tag indicate 70s).

To be clear, I am not trying to catch the seller. I don't suspect her at all, (sorry if she is reading this right now!) but its a decent amount of money and I am looking for just a bit more info before I shell out.




Thanks in advance for any info SF users can provide! Have a great day.
Edited by Cold Storage - 11/19/12 at 5:26pm

....bump.[Edited so the pics would show direct instead of a photobucket link.]

 

Not sure why I can't get an answer but If I am doing some type of SF faux pas please let me know..

PM or even go for a public flogging if that's your style. I got thick skin.

 

I also posted this in the "ask a quick question" thread but it went unanswered. Figured the thread title might attract a  generous expert willing to share their knowledge.