After I did my reserch I found out nothing :)
Sorry im still new, my reserch is still limited as my knowledge also,colours and shades are most difficult to me,and it's a bit difficult with english to me.
No matter what I really enyoj in stamp world, and looking forward to learn a lot.
I have 2c Washington perf 11*10.50,looks like nothing special, than I noticed white spot in red circle at lower left corner. Is that erroror or some identiti of stamp.
Please would you be so kind to identify it in Mi or Sc cataloge.
Thanks a lot.