Vintage Paolo Santini Silk Blouse 
Black with Gold/Beige and White "PS" Logo Allover
Sheer
Shoulder pads
Collared
Button Front 
The size and material content are both cut out but it looked and felt like it was obviously silk when I saw & touched it.  After researching this item it confirmed to me that it is silk. 
I am showing it on my size 6 mannequin and it is a little oversized. I looked up other similar shirts by this brand and the measurements are consistent with a size 8/10 medium.  

Measurements:
Chest (armpit to armpit, lying flat) = 21.25"
Length from top of shirt not including collar to hem = 28.5"
Sleeve (shoulder seam to end of sleeve) = 23.25"

I carefully inspected this shirt and found no flaws!! I didn't find any pulls in the fabric, stains or signs of wear. It is a beautiful piece and I did not find another one like it on any platform!  I will package very carefully and ship quickly!

Thank you for looking! Please feel free to ask any questions.