2 coins of medieval Bulgaria (ID help/confirmation)

Hello all ! I've got these 2 coins and I think they are 2 coins from the reign of tsar Ivan Sracimir (https://en.wikipedia.org/wiki/Ivan_Sratsimir_of_Bulgaria)


Aprox. 17-18 mm

I've managed to find some info here : http://www.wildwinds.com/moushmov/bulgarian.html
Can someone give me some more info about those ? Like the denomination and if they have different mintmarks (I noticed that in the first picture , the first coin, under the king there is something like a flower/sun and on the second coin something that resembles an ax ? )

Bump