Does anyone know this maker? CJ Jakobson

[aknamc]

Hello all. I am trying to learn more about maker CJ Jakobson. I have this small cup that I believe is silverplate but would like confirmation before I write it of as such. It is marked CJJakobson and NS on the bottom. Measures approximately 3 1/8" tall, 2 7/8" diameter (mouth), 1 1/4" diameter (base).

Thank you in advance for any information.