I'm having a very hard time with the same thing. I have earrings marked 585FB. From what I've seen so far the mark FB stands for Franz Bergmann. Finding out any more information than that is at a stand still. Sorry not more help than that. Maybe your search will find more than I can.
750 is the marking for 18 KT Gold, and most likely FB is the hallmark of Franz Breuning. Is it a modern looking piece?
fabric
people
tyhj
14
fb stands for frontier brain. it must be a new type.
The "14k" on a ring indicates that the metal is made of 14 karat gold, which means it contains 58.3% pure gold mixed with other metals for added strength and durability. The "fb" may refer to "filled base" or "fine bezel," but it's less common and not a standardized term. Always check with a jeweler if you're uncertain about specific markings on jewelry.
Nbd means on either text, in person, or on fb (facebook) no big deal
Cracks Me Up
bundles of laghter
dtc means "dans ton cul" in french (in your ass) and fb means facebook
FB friend refers to the relationship between two friends that are connected on Facebook.com.