Roman Republic as (Janus, number I above the galley, no text on either side) [resuelto]

Good morning,

Could you please help me identify this Roman as coin?

It looks like the one at the link below, but the proportions of the images do not match 100%, and there is no visible text below the galley image:

N#154512

The one at the link below seems to be a good visual match (especially the shape of the galley's prow, which looks very much different on other types, but the I number on my coin is thicker than the one at the link below).

Either way, the coin does not seem to be listed in the Numista catalog, and I was unable to locate it in the online catalogs of Roman coins:

https://coins.ha.com/itm/ancients/roman-republic/ancients-anonymous-after-211-bc-ae-aes-grave-as-36mm-3817-gm-7h-ngc-xf-5-5-3-5-smoothing/a/3096-30048.s

Please correct me if I am wrong, my understanding is that the coin must have been struck shortly before 200 BC, because it features I above the galley, while later versions of the as feature something else on the same spot (letters, or images of animals, etc.)

Found:

https://rucore.libraries.rutgers.edu/rutgers-lib/46173/

As - Sydenham 231, 143 - Crawford 56/2