There are no records, that I know of, of the handstamp you show appearing on a US stamp of the 1869 period.
The Hiogo, Japan cancellation, which is seen on some of the stamps of the 1869 issue, doesn't have a line across it.
It looks like this:
http://www.siegelauctions.com/2012/1037/1665.jpgThe cancellation on your stamp adds no additional monetary value to the stamp. On the other hand, as it is not clear, it detracts, more than adds, to the value.
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