Ignorance is bliss.
There is a raised line on the hull, it just happens to be the ship's handrail running from bow to stern. Mine is very prominent in hand. The atttribution presumaby coming from a phrase search of their limited literature.
At the end of the day, it is a business boxing above its weight in terms of knowledge when claiming to be all things to all people and (like Trump) never wrong - hence many fictitious attributions and for knowledgable people, just used as a pointer toward a potentially decent coin. However, an unquestionable marketing success. I don't know if they still offer a cleaning service, but it seems to have laid low after I questioned why they were so intent on selling 'unsightly' wax removal given it was historical evidence of past illustration in early catalogues.