I am the original owner of this beautiful instrument and I have taken really good care of it.  I purchased it in 2012 from Lazar's Early Music new.  I comes with the case (note the stains from oil), and some Kung cork grease.  The pads are near perfect with only some minor signs of use.  I am selling because I have not played it in several years preferring to concentrate on my Japanese shakuhachi flute.  The Superio line is Kung's top of the line instrument.

This tenor recorder is distinguished by a brilliant high register (can be played to G''', giving a range of two-and-a-half octaves), but it still has a wonderful depth: strong and with a full sound, even on the bottom notes. Thanks to its large range and rich sound, it can even play select flute literature.  Their rich, full sound and dynamic playing makes SUPERIO recorders a popular choice, in particular among professional musicians and soloists. The curved windway carefully and precisely carved by master craftsmen produces a distinctive sound.
The Bass, Greatbass, and Subbass recorders have the most sonorous, round, and clear sound. In addition to use in professional soloist playing, they are extremely popular in ensembles. In spite of their dimensions, the large recorders can be played comfortably while sitting or standing. Their agility in the high and low registers alike is remarkable.Here is a sample link of this model being played...
https://kuengblockfloetenallink-live-165f3150eb-70db399.divio-media.com/filer_public/fd/3b/fd3b43c8-44b5-4858-ab69-c4e95e2af614/10_glass.mp3