Shade looks wrong, my guess is Scott 65. What is the paper like? The 104's I've seen have a much richer and bolder brow red color but from scan to monitor no way to be 100% certain.
Siegel's reference census of known used copies of #104 (re-issue) attached. None have pen cancels, which is more the exception than the rule by 1875 and onward. It very unlikely that you have a #104 based on what I can see in your photo. Also, note the re-issues in this census are all well centered.
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