Help with identifying thimble maker mark?

[chiwawa]

I recently had this item for sale.  I rejected an offer and the buyer immediately started messaging me that I had it listed incorrectly.  That I had identified the mark incorrectly. I removed the listing but the user continued to harangue me.  I had researched it before listing it and I'd like to see if I was correct or incorrect.  Could you help? 

I'm going to post three photos.  Two of my thimble and one of a mark I found on the internet that I used to identify my thimble.  

Thanks for any assistance!

[newyorkramsey]

Check out this website and scroll down to United States.

https://sites.google.com/site/thimbleidentificatio/home/metal-thimble/metal-thimbles

"Simons Brothers, Pa. (SBC mark used on nickel silver). Sometimes 'sterling', sometimes 'sterling silver'."

I think it is confusing because they used a different mark on sterling thimbles than on non-sterling thimbles.  Yours is apparently nickel silver according to that website.