USA #25 Plating Question

I recently bought (Kelleher) the following USA #25. I liked the centering and the face-free cancel. When I received it, I was looking at it under a glass and noticed that the upper frame line does not touch either the left or right outer frame lines. It also appears to have a similar 'break' at bottom right. My passion (and study) is more with the 1851 imperfs, and I couldn't find anything about this 'variety' in my copy of Chase. What am I looking at? Is this scarce/common on #25's? Would this be of any great aid in plating this example? Any comments would be greatly appreciated!! (My scanner only scans to 600 dpi, as seen here)

A note under the category of Other Recutting in my Chase book reads, "No marked errors of recutting, though frame lines often fail to meet squarely".

Edit: Sorry forgot to mention that notation was for plate 8.

Frame lines not meeting at the corner is characteristic of Plate 8.

Thank you, Stampcrow, I see that now. And, Sinclair, I see that now, too. Chase goes on to say that the bottom frameline is lightly recut on plates 6 and 7, except for their bottom rows where it is more heavily recut. Bottom frameline always recut heavily on Plate 8. Therefore, I suspect my copy is from Plate 8, but not conclusively so unless other plating characteristics can be found. That's a good place to start, anyway. Thanks!

Really nice stamp, BTW. Mrfancycancel sold a nice #25 a few weeks ago that I forgot to enter a bid on. Is this the one?

This was Kelleher's Lot 6054, Sale 5028.