HINRICH WITT GMBH.

Mitchell shows a wider white ring surrounding a small red circle on the funnel, with the lettering in black pencil. Flaggen & Schornsteine 1957 gives a darker W on the flag. The FOTW flag is attributed there to Heinrich Witt GmbH.

The funnel and flag are documented by US Navy 1961 and Stewart 1963; no separate verbal comparison is supplied.