STOOMVAART MAATSCHAPPIJ ZEELAND.

Haws gives Z20 in 1875, followed by Z19 in dark yellow with a narrow black top in 1876–1887, then buff with a normal black top. Z21 carried a broad Dutch-colour band in 1915–1919. Z18 followed in 1920–1939 with narrower bands; both top and bands narrowed further from 1946. The Ships List chronology differs, assigning Z21 to 1875–1877, Z19 to 1878–1914, Z21 again to 1915–1919, and Z18 from 1920. Haws dates the embossed gold crown to 1989 in this passage, contradicting his earlier 1985 date.

A monochrome photograph of Loningen Emma confirms the funnel; Merchant Ships describes the buff as deep cream.

James Dignan’s FOTW flag follows The Dumpy Book of Ships and the Sea, published about 1957.

The 1939 flag chart supplies this funnel and flag variant without a separate verbal comparison.