Where is the watermark?

I bought N#206737 recently and noticed on the page has two main listings. One from the US with “Military Authority” on it and the British version with wavy lines

I believe I have the British version but would like to know where the “Military Authority” watermark since internet searches haven't help me out

Why are you showing us pictures of the notes with light shining on them from above instead of from below, how would you see the watermark that way?

The wavy line water mark is quite substantial, and should be easy enough to see if you hold your note up to a good light source. 
I find that bright daylight through a window works very well for making out difficult to see watermarks.

I have the British one. I tried to get the wavy lines to show up the best i could with the setup i had available, i boxed in the three sections of wavy lines the best i could. You can slightly see the wavy lines running from edge to edge, in groups of three in each red box. Best i could do. Hope it helps.