Die Astronomische Gesellschaft 1863 – 2013 : Bilder und Geschichten aus 150 Jahren / herausgegeben von Dietrich Lemke. (OCLC #870898902)
This festschrift (!) about the history of a German astronomical society needed original cataloging because there was no English-language record for it, only German. That is, we needed a record where the transcribed elements (e.g. title, statement of responsibility) were still in German, but many recorded elements (e.g. pagination, bibliographical references) were in English.
From OCLC Bib Formats: “Historically in WorldCat the absence of subfield ‡b has indicated that English is the language of cataloging. OCLC now recommends always coding this element." Also, 936 is no longer used to link parallel records.