Porthole from the service module which is connected between Soyuz and the ISS.

It hasn't been to space because it looks new, maybe it's a spare part that wasn't fitted.
From this module, among other things, you go out into the open space, this is where the Orlan suits are stored. In this module, food, oxygen tanks, suits, food, etc. are sent to the ISS.

 Although the number comes from a Soyuz that was in space. 

Made of aluminum and 2 very thick sheets of lead glass, protecting against cosmic radiation. I think it weighs around 20 kg.

Other portholes from the photos will also be for sale soon. 

I have a lot of different parts from Soyuz, I will be showing on more eBay pages in the future. Now I have a limit as a new seller, but every month this limit is increased. Check out my pages.