Two Mysterious Coins

The second coin it's
Septimius Severus AE Sestertius. 194 AD. L SEPT SEV PERT AVG IMP III, laureate head right / MONET AVG COS II P P, the Three Monetae standing left, each holding scales and cornucopiae, SC in ex. Cohen 336.
But looks fake for me

The "1805" date in the Hibernia token is fictitious, intended to get around anti-token laws by pretending to have been issued before the laws were enacted. In 1805, the fellow depicted on the obverse was known simply as General Arthhur Wellesley; he was not promoted to Field Marshal until 1813 and did not become the Duke of Wellington until 1814.

I understand that the vast bulk of these latter-day Hibernia tokens were shipped to Canada in the 1820s and 1830s.

And I agree with t0rress that the ancient Roman sestertius is a replica. It has the distinctive bubbly surface and mushy details of a cast "tourist copy". Compare it with the genuine examples here and here.