Fraught with danger and inherently risky as this is, I am going to try to identify this stamp based on a scan and comparison to similar examples in my collection
Quote:
I'd say 1879 Line perf 14.25 by Perkins Bacon
Here is an example of the 14.25 line perf from Perkins Bacon. A typical example of the Perkins Bacon perforations. Small perforation holes, and lacking the "clean" punch found in the Somerset House perf 14 issues.

By comparison, here is a conveniently dated example of Barefoot 1, perf 14 by Somerset House.

Based on these examples above, I conclude that the OP's revenue is
either Barefoot 1 or Barefoot 13, and not Barefoot 17.
If the OP could advise whether the revenue's watermark is a LARGE or SMALL star, and whether it is upright or sideways, this revenue can be positively identified.