Hello!
To my tired old eyes, your stamp looks to be a Sc#65 or possible a 64b. The reason I say this is because your scans exhibit far to much of the rose color. Attached here are a 64, 64a, 64b, and 65's.
I do hope this helps, but without having the stamp in hand there is no positive way to tell. I hope you do understand that the A25 series is, if not the hardest, defiantly one of the hardest stamps of US pre 1900 issues to judge color.
Ron

Sc# 64 Pink

Sc #64a Pigeon blood pink

Sc #64b Rose Pink

Sc #65 Riose