2. The loop was cut on the top where it is fringed now.
So the knot was probably a center of the rope knot.
I guess your "so..." says that the overall structure
had this knot in rough/logical *center*, with just
a smaller loop above (as shown), and some longer
loop (knotted?) or separate ends below?
As for "on the top where it is fringed", do you
mean the pictured topmost part of the rope,
which I thought looked like an
overhand knotbut could be someone just holding cut ends
of the rope roughly together --one end over
the other (it's not a clear image)?!
Below this, the sides of rope from the top
flow into the highlighted knot CLEARLY in
an overhand crossing such as is used to
begin a
square or
granny knot --and nothing
like what Luca shows, which you think looks
like it (!!

?).
But below this --i.e., the finish to that start--,
one sees clearly a part exiting/entering off
the lower left side and down,
but no corresponding part on the other end,
and there is some whiteness to the left of
this visible strand (maybe something in the
background).
AND as a
granny, this doesn't look tight at
all, in geometry (for the ends should swing
around more, away from tail-by-SPart adjacency
(and thereby distinguishing itself from the
square knot).
--dl*
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