Portugal Imperforate #5 Or 9?

I was told this was a #5, but I see the #9 is very similar. Any shared expertise will be very much appreciated.

Yours is the 1855 stamp. The flowers are much more ornate than those on the 1856 stamp.

I'm thinking I will concur with NSK. According to Mundifil, Scott #5 is supposed to have "cabelos lisos" (straight hair). #9 in Scott is supposed to have "cabelos analados" ("ringed hair," or in Scott, curled hair). Mundifil does not mention the flowers, but in doing a quick comparison in Mundifil, NSK appears to be correct.

For your further "amusement," Riley, Scott lists no varieties for #5; Mundifil shows 8, and illustrates all. For #9, Scott lists 6 varieties plus a double impression. Mundifil lists 20 varieties of #9 and illustrates 13 of them. Note that the Mundifil numbers are 5 and 10.

As an aside, I have the current, 2018, 32nd edition, of the Mundifil catalog for Portugal and the adjacent islands. The former colonies are in a separate Mundifil cataog.

Thank you for your replies. To clarify, the curled hair on the figure means it is a #9? But isn't the #5 the 1855 issue?

Here are what Afinsa shows:
1855


1856

No expert here, but judging from the Afinsa examples that billsey has posted, and especially from the quasi-floral element of the design in the upper left corner (just to the lower left of the "C"), I'd say that you have the stamp of 1856. Check out the blown-up detail sketches of varieties IV, VIII and XI of that Afinsa page. Also, in your stamp the young king's hair seems rather curled than straight. Hence Scott #9 rather than #5.

Seeing this page from Afinsa, I think it is the 1856 issue. The floral ornaments seem highly variable for both issues. All varieties of the 1855 stamp seem to have an open loop to the 5. Your example has an almost closed loop. The broken O of variety VIII looks like a candidate.

A minor clarification......the Afinsa numbers are still being used. But the catalogs now are Mundifil catalogs and are edited by Sr. J. Miranda da Mota, a noted Portuguese philatelist and expertizer. Memory is getting a bit faint. But I recall the original Afinsa company getting caught up in some sort of pricing scandal back in the 1990s. The scandal also had an impact in the US.