That is the funnel of the NORWEGIAN East Africa Line. (A subdivision of the N.A.L.) Yellowish buff with the Norwegian national flag colours. You can get the colours from any color photo of the Stavangerfjord, Bergensfjord, Oslofjord, Sagafjord, Vistafjord etc.
Thanks very much. The photo is of the funnel of the Clan Macgregor that was under charter to I thought SEAL in the 1970s. I should have recognised that familiar funnel of NAL, but was fooled by the abbreviation SEAL, thinking it was the company below.
The "Scandinavian East Africa Line" was founded by Thor Thoresen in 1913. The "Scandinavian" part consisted in their ships loading goods in Sweden, Denmark and Norway, mainly timber, before heading South, going through the Suez canal and down the East coast of Africa. There loading Kopra, lard and skins for France and Scandinavia. In 1921, N.A.L. bought the company, its ships and their routes, and also the company's name. Which explains the abbreviation SEAL for an integral part of the Norwegian company NAL.