Identifying hallmarks. Silver Cutlery, would like some help knowing its history! (pictures of stamps included)

Hello everyone,

First post ever here, so forgive me if I make some mistakes.
I’ve recently acquired this silverware just because I thought it looked pretty, I spent some time on the internet tracking down marks but nothing came up that looked similar.

I bought it as 1 set but it seems there are 3 different markings on it.
If anybody could shed some light on this, I would really appreciate it!

If more information or pictures are needed, please let me know.
Thanks in advance everyone.

The SIME brand looks just like French silverplate.
It would be better to have the cutlery tested

Thank you for your response,
Any idea where I can find some more info on SIME? The internet leaves me clueless.