I have spent the entire weekend, unsuccessfully trying to identify these marks. I am hoping someone with more experience can guide me in the right direction. Portugal, maybe?
Thank you very much in advance.
That is the city mark for Porto. Your P:ortugese idea was correct.
Paul.
Paul - Obrigado!
But it is in fact sterling silver then?
That Porto mark was used from 1843-1853, when the grade of silver was 958/1000, which is the same as English Britannia Silver, sterling silver is 925/1000
Paul.