Maybe more info about the producer https://image.noelshack.com/fichiers/2020/32/1/1596474018-cuk.jpg https://image.noelshack.com/fichiers/2020/32/1/1596474100-cuk1.jpg https://image.noelshack.com/fichiers/2020/32/1/1596474160-cuk2.jpg https://image.noelshack.com/fichiers/2020/32/1/1596474230-cuk3.jp...
Probably yes. I do not want to be as short with my answer as you are with your question. "13" is usually a good indication for 13 lot silver. Normally the 13 is in a circle or rectangle, I am a little doubtful with the plein number. What does the text between the two 13 read? Can you post...