I know this has been forever since you asked, but I just now saw it. Your images are no longer available.
On to your "S925" Most people believe that the "S" means it's from China. But, I've read it can also mean Scandinavia, which would imply Jensen. However, I haven't seen anything definitive on it being Scandinavian. Just remarks here & there. I would love to know for sure!!
Does anyone know, 100%, not 92.5% (I had to, LOL), if S925 designates only China. And, if not, what else does it signify?
FYI Jensen actually began with .825, gradually rising to .925 by 1930.
However, prior to the 1970's, when the period was officially dropped in the UK & US* (925 is now being adopted worldwide as a substitute for "sterling"), it was always stamped ".925" That little period says A LOT. Since I can't see your photos, I don't know if there is a period. From what you wrote, there isn't.
Extra 925 info:
"925" has been used in America since the 1850's. *Many people think 925 or .925 is something new. I often hear "since the 1970's." You can see above where this confusion came from. In other countries (though now 925 is being adopted worldwide) & in the US & UK, prior to 1906, "Sterling" was subjective. There was no legal standard. You can find the article here in Resources that has the Act that made "sterling" "ster" etc refer only to the silver standard. Which here & the UK is 925 of 1000 parts silver, or .925 or 92.5% Some say the act also made ".925" a requirement. But, as you see from all the silver pieces only marked with some form of "sterling" that you know is newer than 1906, this isn't true. There's no where in the Act that even refers to "925."
For newbies; pure silver is soft, difficult to work with, and will nick & dent very easily. The remaining 75/1000 is usually nickel, or a combination of hard alloys.
*Nickel allergies, this is why many people, including myself, have allergic reactions to anything below 14 or 18K gold and 925 silver. The lower the gold or silver content, the higher the nickel...
If I have anything wrong here, I'd appreciate kind corrections., I've done extensive research, but would not say I'm an expert.