The die flaw on your coin is actually in a slightly different location to the one on the coin I pictured earlier, making it a different obverse die, and the 8/?’s are also different. If you count border teeth (beads) from the numeral 1 of the date to where the flaw meets the border you will see that the flaw is one bead further away on your coin. Different flaw positions = Different Dies.
In the set of pictures below, your coin is like the bottom two pictures, and the one pictured earlier (like Mike’s) is the top two pictures.
It’s not entirely clear what Bramah had in mind when he documented his type 25c, but our two coins are definitely from different obverse / reverse die pairings.
Re. Rob’s above comment, die flaws can be great in helping identify some of the rarer coins, and they also give us a ‘chronological sequence’ i.e. as the flaws develop. You will see that the obverse on your coin has a number of die flaws; these flaws are seen developing in the exact same locations when this obverse is paired with two other earlier reverses. The second of the 3 reverses paired with this obverse is the rare large rose large date variety. If you look for an 1858 large rose large date you will see these obverse flaws, albeit to a lesser extent, noting the same 1 over 1 in the date as well as the same 8/?.
Hope this helps, rather than confuses!