iẓhār nūn (& iqlāb mīm)

Marijn van Putten has discovered the iẓhār nūn
both after tanwīn:

and "normal" nūn sākin:

and even one example where the extra green nūn is misplaced ‒ suggesting that the colour signs were added in a second phase:

should have been like this

I'm a bit dis­appointed that van Putten has never seen or heard of iẓ­hār nūn, al­though I have pub­lished about it. I first dis­covered it in Bom­bay reprints from Indone­sia, but later both in Indian mss. and prints.