The Rudolf V/v. sailed as a J/E in the period you are looking for. Great crowd of engineers. maybe 64/65. We had a 4 engineer Rudolf Henerson who insisted that an accommodation steam drain return was in the clossed position: Every time on watch this vavle had to be checked (Regardless of reason) and it became know to us enginneers at that time as the Rudolph V/V and as such entered into the dirty log. Rudolph I had previosly sailed with on the Queen.