Documentary images — company attribution uncertain

Brown 1958 shows a blue swallowtail with a yellow S, apparently supported by black-and-white ship photographs. Mitchell’s funnel instead has a white S and is placed under Eman Högberg. Bryggan assigns the blue-and-yellow livery to Rederi A/B Staffan, which Svea acquired and later absorbed. US Navy 1961 also gives Staffan this flag, but with a different funnel.

Conflicting allocations do not prove shared use.