Transatlantic [Rederi A/B Transatlantic]

I assume that the company is in fact Rederiaktiebolaget Transatlantic, given the letters R-A-B-T.
Ole Andersen, 23 September 2000

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Originated 1904 as Swedish South African Lines with the letters being "SSAL" in place of "RABT". Lloyds confirm that the correct name is Rederiaktiebologet Transatlantic. In 1998 they were acquired by Bilspedition A/B and later lost their identity.
Neale Rosanoski, 5 August 2003

(part of Transoil) - yellow flag, black disk charged with yellow (sort of) "K". This firm originated from Stora Kopparbergs Berslags AB; Kopparberg is a town and län (now Dalecarlia) in Western Sweden.
Jarig Bakker, 12 August 2005

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The name was an oil and gas brand name originated 1947 by a joint venture between the mining company Stora Kopparbergs Bergslags A/B and the shipping company Rederi A/B Transatlantic [through their subsidiary Rederi A/B Transoil] producing Koppartrans Olje A/B and Koppertrans Rederi A/B. Shell took a 50% interest in 1958 and then full control in the mid 1960s. The emblem is a "K" formed as a stylized gryphon with a red flame extending as a tongue representing the eternal flame on an oil field. The brand was probably more familiar of land through gas stations and the logo can best be seen at Gas Signs. By the early 1970s the brand had disappeared but has been resurrected as a clothing design brand. Loughran 1979 ^[2] shows the flag under Stora Kopparbergs Bergslags as owners of the "Stora" in the early 1960s.
Neale Rosanoski, 18 May 2006