Diamond-B kosher symbol (B / FS / UC / D)B
Unknown, Unknown
B
Mark: A diamond/rhombus enclosing a large letter 'B' with small letters 'FS' over 'UC' and a 'D'.
Recognized endorsed by 1 major authority
COR
Kosher certification symbol shown on the COR card; exact issuing agency not labeled in English on the card.
Shown on the COR Kosher Symbol Reference Card (top card, row 2): a diamond containing 'B' with 'FS/UC' and 'D'. Issuing agency not explicitly named on the card; recorded by symbol as shown.
How to use this safely: a listing here is not an endorsement. Only trust an authority if one you (or your community) already follow recognizes it — see the “endorsed by” tags above. Standards vary by community and by individual ruling, so always confirm with your rav.