There is no true window in this sapphire. A tilt window is not a flaw. All gemstones will show one if tilted far enough. The cut isn’t the best, so the tilt is more easily seen, but it’s not badly cut either.
I am not impressed with the first few pictures but perhaps the OP wasn’t able to capture the colour accurately, who knows.
@vik84
Does the sapphire look like the video to you or it’s not as bright? If you don’t reside in the tropics, expect the sapphire to be much darker and less lively in temperate climate where the sun strength is weaker.
Further proof the photos and the video are of different gems--see the triangle in the 1st & 2nd photos? I mean the facet with the tip pointing to the girdle. It does not show up in the video, which shows more facets in the crown of the video gem than the gem from the photos, which has a bigger table, fewer facets. I am convinced they are different gemstones. Is the video your Burmese sapphire, @vik84 ?
Nope, just sits on a basket with the prongs holding it. Also, the back is not closed, the jeweler didn't see a window under the loupe and he recommended the setting to let the culet to just touch the skin.The color pops much more in that setting. Does it have an enclosed gallery?