Need help with hallmark

[Holt0222]

Hey guys found a tea pot with the following markings. Please help.

 

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[Holt0222]

It looks like it’s silver on copper. But can’t figure out the hallmark.

 

[captain flintlock]

It is for Forbes Silver Co. A division of International Silver. It’s probably from the 20’s or 30’s and definitely silver plated on copper.