Five digit Sterling Silver marking?

[Ronstar]

I was going thru some junk jewelry finds and remembered getting this little bracelet a year ago or more. I knew the charms were not marked but thought I could see something on the bracelet clasps. Using 20x loupe I could read 925 and then 15 upside down after that.
I’ve never run into this and so far I cant find any info, anyone else run across this?
(I tried to enlarge the area but its telling me the “file is too large”. I was able to still read it by blowing up this photo).

 

[Ronstar]

Still no one? Im fairly easy to get stumped but you guys usually pull an answer out! Probably end up taking to a jeweler and paying them to research……..
Stupid hobby

 

[HuntinDog]

I'm pretty sure that your mark is 925 SI .. which stands for sterling silver.

 

[Ronstar]

Isnt it normal tho if not using 925 to stamp STER? I see how you see SI but if you turn photo upside down in more appears 15…… I dont know but thats why I asked!

 

[HuntinDog]

Do a search for 925 SI and you will see how it is used.

 

[Draco]

I'm pretty sure that your mark is 925 SI .. which stands for sterling silver.

I agree.
925 SI= Silver

 

[Monkeys Uncle]

Reads "SI" to me and logic says "no reason to stamp in one direction, then invert and stamp in another".

 

[Ronstar]

Well at this point even the jeweler is stumped. The S would be different than a 5 in jewelers world, and that makes sense. Under higher magnification it for all the world appears to be a 5 that is inverted. There still remains the possibility its the makers mark. That, unfortunately would get a bit spendy to have someone with the resources (books) to do the research.

 

[Draco]

Ron, if you look closely, the 5 and the S are different.

 

[Odanscoils]

Maybe the jeweler lost his S.

 

[Ronstar]

If you turn the photo upside down the 5 now looks like the S and vice versa……..