Lynda
It was an artists impression. The image was widely used in the first brochures, the maiden year menu cover, biscuit tins, teea towels... so the image lives on but haven't a clue what happened to the original.
Three other artists impressions were also created (below). Interestingly, these were not very widely used and two of them depicted Q4 in the Panama Canal. Again, who knows where the originals are?