The stamp appears to be Germany Scott #49, CV$1.40 if it is ultra. CV only applies to well-centered, undamaged, lightly cancelled stamps, so this stamp's value is much less.
There are other possible shades as well, some of which are more expensive (prussian blue: CV$115, grayish ultra: CV$7.75)
From what I can see, the stamp is essentially worthless, due to the perforations being cut off.
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