1991 $20 AIV...

I feel kinda dumb, but…
I entered this bill and then noticed that the I in AIV had none of those serif thingies…
I had no other twenties with I's on them and couldn't recall whether they do or they don't generally look this way…
And I remembered a thread about serifs…
So, help me out here guys…
should I stamp it or not?

Thiessen-Crow. If uncirculated, about $40 bv. otherwise $20. If EF, can be more, $25, depends on market.

Yes it is Thiessen-Crow which I haven't noticed before. Very cool!
But the center crease is well worn and there is a teensy tiny hole in the center so I guess I stamp it and send it on.
Oh well…