You have got a DVC PRO
DVC PRO cassettes were mainly used for professional purposes. From 1995 to the years 2010, they appeared regularly at (inter)national broadcasters. There, they are also known as D-7 (DVCPRO 25) or DVCPRO100 (DVC PRO HD).
Did you notice the accent colour on the cassette? It is linked to the bit depth: the ‘resolution’ of the audio file. The higher the bit depth, the more precise the sound per frame is captured.
… that the playing time varies between 12 and 184 minutes?