1960 Sc 2319 Helicopter Air mail. Scott C98 Full sheet w/ plate flaws

1960. Air mail.

Catalog numbers: Scott C98, Standard Collection 2319, Michel 2324, Yvert A112.

Full folded sheet 10×8 with multiple plate flaws / varieties.

23th – blue stroke below O in ПОЧТА
29th – two white dots near the left margin
33th – white dot spot before П in ПОЧТА
54th – white dot above 6

and some others.