Looks like perf 10 vertical which makes it either scott 446 or 456 or 495. The latter two will be slightly larger than 446. That's all I know. edit-- 495 will not be watermarked.
I also wondered if it was a precancel, but am not knowledgeable at all in that area. Good luck on checking the watermark. I used to have a lot of trouble checking them on early USA issues. I think odds favor it being 495.
Might be Batavia ILL PSS-461. That precancel is known to exist on the 4cent coil. The "I" of Illinois is always centered under the "A" of Batavia like that.
thanks! I think that on some of my stamps I saw also post-cancel, but most fancier than this one. I will scan and show it here if I remind where I saw it...
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