This is a second issue of the Bi Planes, this is the 24c carmine, last in the second issue.
This is a very nice example of a Bi Plane, the only draw back is a small tear at the lower right hand corner as you can see in the reverse photo on the left corner. In its F-VF condition it would be worth $100 to $130 in, with the tear I am selling it for $30, would make a great addition to any Air Mail Collection, Scotts ‪#‎C‬ 6. I hope you can use it at this value.