Help identifying coountermark on Lilybaion coin

[tiago1480]

Hello everybody.

I would like help identifying the countermark of this coin.
It appears to me to be a coin from Lilybaion, Sicily, c. 2nd century BC. Æ, Laureate head of Apollo and Kithara (23mm and 7.22g).
There is a counter mark on the obverse and another on the reverse. I'm not sure if the second one is the same as the first and is just worn out or if it's something different.

https://www.forumancientcoins.com/gallery/displayimage.php?pid=176644



I asked a youtube channel called Numischannel for help.
https://www.youtube.com/watch?v=ioogIrrmJyk&t=978s(from 19min19s). I was very well received by Damian.
It has been suggested that the first would be a monogram and that the second might be a dog.
Near Lilybaion there are two towns, whose symbol is the dog (Segesta and Erice). Perhaps the countermark would help this coin circulate in one of the cities.
But there was no certainty because it was not found in Sicily's countermark catalogue.
This is the first time I post a topic.
I'm grateful for any help.