> That's not a "DB"-19.

It is the colloquial term for the connector (regardless of what the 'official' name may be):

> Several computers also used a non-standard 19-pin D-sub connector, sometimes called DB-19,[8] including Macintosh (external floppy drive), Atari ST (external hard drive), and NeXT (Megapixel Display monitor[9] and laser printer).

* https://en.wikipedia.org/wiki/D-subminiature#Common_misnomer...

* https://iec.net/what-is-a-db19-connector/

* https://www.ebay.com/sch/i.html?_nkw=db19+connector

> The early Macintosh and late Apple II computers used a non-standard 19-pin D-sub for connecting external floppy disk drives.

* https://en.wikipedia.org/wiki/D-subminiature#Other

* https://en.wikipedia.org/wiki/File:Mac512k-rear_DB-19_Smartp...