The photo of the younger Nobosuke Tagomi (Cary-Hiroyuki Tagawa), held by him whilst talking with his alternate reality daughter-in-law (Alexa Davalos), is a still of the same actor when he appeared as Cmdr. Minoru Genda in Pearl Harbor (2001).
The "hymn" in the Nazi church at minute 23 is a German melody whose best-known words are the Hans Beimler song. Ironically, that version is dedicated to Hans Beimler, an anti-Nazi German communist who was for a time in the Dachau concentration camp and later died in the Spanish civil war of the 1930s.
The swastika symbol on prominent display in the church is actually a map symbol (manji) for a church in Japan.
Two representative of the Great German Reich are seen complaining to Trade Minister Nobusuke Tagomi about the presence of pirates in water bodies near Sri Lanka. However, the name Sri Lanka was adopted only after the country's independence from British rule following the Second World War. If the Axis powers had won the war, the name Sri Lanka would not have existed and the island would have been referred to as 'Ceylon'.
The cigarettes smoked by John Smith are labeled Fliegen Filter. Fliegen in German means Fly, Go or Travel.