Help W/ 1 Cent Franklin #24 First Plating Attempt

Using online resources, primarily Stampsmarter and the 1 cent franklin archive. I "think" i've narrowed it down to relief C and maybe? 21L 5? Though the lower right portion "Right Plume" seems off. How did I do with my first stab at this?
Thanks
Greg

This is a very difficult example--it's a somewhat worn printing with no obvious plating marks, at least in the photo. Definitely Relief C, but nothing to suggest 21L5 (which isn't pictured in the Doporto Archive and is listed as having no plating marks in Neinken). That said, this stamp doesn't really have the "look" of a Plate 5 stamp, which are typically crisper and sharper in appearance with a deeper color. There seems to be some kind of blur running through Ornament R (see attached)--try to use this as a possible clue.

Thanks, I'll look at it again with fresh eyes.

Upon closer inspection, there is also a dot outside Ornament G in the left margin that might help.

I spent a couple hours going through the examples on stampsmarter and the archive till I was cross eyed and couldn't find a match. Am I right in thinking it must be on plate 9 somewhere? I hadn't noticed that dot. I'll see if I can find it when I've regained some patience.

Yes, I think Plate 9 would be a good place to look. Not every single #24 you come across can be plated using the on-line resources we have--sometimes you need multiples. Or your own reference collection. And Neinken can be a bit sparse when it comes to Plates 8-10. You have picked a difficult but not impossible case for your first plating attempt. I was luckier--back in the early 1980's I acquired a cover with three #11's and one #9. I was always interested in the One-Cent 1851 and on a whim had recently purchased Neinken's book. I didn't really understand plating (as a kid I thought it meant reconstructing actual sheets as they were sold at the post office and couldn't imagine how that was possible), but I decided to give it a go using the stamp on that cover. Lo and behold the #9 was easily identified as 91L1L, triple transfer one inverted. Holy smokes, this plating thing is easy! Then it took me 20 years to complete Plate 1 Late...

Yep, I think I'm stumped. Checked all the C examples on Archive and Stampsmarter, no luck. You don't suppose it could be a different relief?

Not all 1¢ stamps can be plated. I have quite a few type V stamps I haven't even bothered to try.

No, definitely a C Relief. I think it is 62L9.

That is one I lingered over. The scratch in the upper right had me hesitant. I took it out of the album again to look at with a little handheld microscope loupe. If you tilt it against the light you can just see that scratch in the corner, the paper looks scraped there. So I think you are right. 62L9. Thanks so much for your help! I just bought alinked pair tonight. They aren't in great shape but it should be enjoyable, I hope, fingers crossed.