A.A. LOW & BROTHERS.

The usual L could be replaced by a ship’s initial: H for Houqua, and a Contest variant presumed to be L210. The source also spells Houqua as Houua. Some clippers were better known by their own names than by their owner’s.

Nathaniel B. Palmer used NBP. Its namesake was a captain in Low’s service and an explorer whom the source credits with discovering Antarctica.