Hallmark/maker mark help

[2Minnesota]

I took a chance on this one. It's a silver long thin dish with five stamps on it. I thought I could see a crown and the way the stamps were I gambled on it. I cannot find the marks and am a bit overwhelmed when I search. The last stamp is longer and just a blur to me. I see a sideways "S", an M or W, a crown a sideways B? And the mystery mark on the end. Any idea what I have? It was $4.99 at a Savers thrift store. Thanks all!!

 

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[2Minnesota]

Another clearer photo. I don't think it's a crown, looks like a face or a jester??

And this mark (scratched in) was under the sticker on the back.

Thanks again for any help or direction on this!!

 

[G.A.P.metal]

Online Encyclopedia of Silver Marks, Hallmarks & Makers' Marks
OR Mystery Marks -- Silver Hallmarks and Makers' Marks
Might be in here !
Gary

 

[2Minnesota]

Thanks, that's where I searched some. I like that site! I'll have to do more obviously but I was hoping someone would have an idea of country or other starting point.

 

[silverdollarbill]

Hope I'm wrong but it has that rainbow color patina. I've only seen that on plated items.
Did you test it?

 

[captain flintlock]

Great find!! I would still test it as I've seen sterling and lesser purity of silver turn all sorts of colors. It's definitely not English.

 

[2Minnesota]

Well, I dug out the solutions. The 18k acid ate it up almost instantly and the sterling solution took a few seconds but ate it up as well. BUMMER! Wonder what kind of metal it is?

 

[JimDon]

They look like plate marks to me. Sorry it was not silver.