Hello,
I found this teaspoon and I’m so curious about its age. Could help me to identify it?
Warm regards, Daniela
Not much to go on here but I suspect an electroplate mark of Cooper Brothers & Sons Ltd. See here for some examples of their electroplate marks. If you agree with my identification then its age is going to be mid 20th century.
Phil
Yes, that’s true, I could identify the mark in this image.
Thank you so much 
