Unidentified roman empire coins

I have those 2 coins, about the size and weight of an 1 Pound coin.
I dont have scale to use. What are they?

Anything?

Maybe these would help someone ...

1.

2.

Greece (ancient) › Sicily › Lipara - Hemilitron (412 BC - 408 BC)
https://en.numista.com/catalogue/pieces169034.html
On the off-chance I hoped if someone had created a page for that first coin,
that they had put seated and waves in the description ...
https://en.numista.com/catalogue/index.php?mode=simplifie&p=1&r=seated+waves&d=&ru=&i=&ca=3&no=&se=&v=&m=&a=&t=&dg=&w=&u=&f=&g=&c=&wi=&sw=&tb=y&tc=y&tn=y&tp=y&tt=y&cat=y&ct=coin
so luckily they had.

The description for the reverse of second coin is >
Pax (Peace) draped, standing left, holding branch in right hand raised
and transverse sceptre with left hand.

S (-enatus) C (-onsulto):
"[struck] by Decree of the Senate".

Citeer: "ZacUK"​ The description for the reverse of second coin is >
​Pax (Peace) draped, standing left, holding branch in right hand raised
​and transverse sceptre with left hand.
​
​S (-enatus) C (-onsulto):
​"[struck] by Decree of the Senate".

​Thank you so much, I'll try to identify the second one as well.

The 2nd one looks like Emperor Gallienus. Something like this:
http://wildwinds.com/coins/ric/gallienus/RIC_0391.jpg

Citeer: "alfonz"​The 2nd one looks like Emperor Gallienus. Something like this:
​http://wildwinds.com/coins/ric/gallienus/RIC_0391.jpg
​

​Is that on numista?

I couldnt find it there.

Citeer: "alfonz"​I couldnt find it there.

​Thank you!