


K39 is the original funnel, still used for deep-sea ships according to Alan Watt.
K40 was used for ferries from the 1950s to the 1970s. Mitchell bases it on Murasaki Maru, 3137/1960, with a line drawing; the FOTW flag follows Stewart 1963.
K41 has been used on ferries since the 1970s; Mitchell also records it.