Is This Tiffany & Co. Authentic?

by Brian
(South east Michigan)

Hello,
I am a rare coin dealer and occasionally buy jewelry with collections. I have a ring that turned up in the sift that looks as though it says Tiffany & Co. I have not been able to find any info on this Tiffany Maker Mark and am wondering about its authenticity.

This is a plain Gold Mens wedding band. The marks are fairly worn. It looks as though the carat purity is worn off with only specks of it remaining and only part of the Tiffany & Co. is still visible. I have acid tested this ring and it tests as 18k or better.
Any help or information would be appreciated.

Thank you
Brian