THOS. & JNO. BROCKLEBANK LTD.

An 1819 Perseverance painting confirms B120. It was replaced by B119 in 1820. The flag was always flown at the foremast, possibly because early privateers reserved the mainmast for a letters-of-marque pennant.

The later flag is divided vertically white at the hoist and blue at the fly. The funnel-band blue stands out from black in monochrome photographs, while a February 1977 Lyttelton observation describes the flag as dark blue. References also attribute the livery to Anchor-Brocklebank and Brocklebank & Well Lines. The museum flag, dated about 1951, measures 1828.8 × 2514.6 mm.