Portuguese maker's mark?

[martako]

Hi,

Anyone recognize this mark next to the .833 Porto standard mark? There is a star in the centre. Thanks.

Marta

https://imgur.com/a/EDfT5O1

[dognose]

Hi Marta,

Please embed your images.

Trev.

[Funkel]

Hello Marta, on the one hand we cannot see the image of the piece and we would all like to see it. On the other hand, I am sending you the most similar brand I have found, it would be nice if you can tell me if the F appears in the brand of your piece, hopefully yes.
Greetings

Hola Marta, por un lado la imagen e la pieza no la podemos ver y a todos nos gustaría verla. Por otro lado te mando la marca mas parecida que he encontrado, estaría bien si me puedes decir si la F aparece en la marca de tu pieza, esperemos que si.
Saludos