When one talks about the possible 1858 overdates, there is an assumption that previous dies from an earlier year were reused with the final digit being altered or over-punched, i.e the 1858 over 3 is an altered die from 1853 (or, as Gouby theorises, 1852). One assumes that the Bramah 25c above also results from these dies or 1854 or even other.
The problem is that the 1858 large date, 1858 over 3 and the Bramah 25c are clearly struck with the classic large date 5 with the distinctively shaped pointed top as seen below:
(sorry about the different size of images)
But 1853 and 1854 (and 1851) pennies, however, were struck with very differently shaped 5s, suggesting that dies from those years were NOT re-used.
Unless I'm missing something ?