I have come across this forthcoming release - the Op104 & Op105 would seem to be first recordings! https://www.amazon.co.uk/Trio-121-Duo-Albrecht-Breuninger/dp/B0851MJJDH/ref=sr_1_8?dchild=1&keywords=scharwenka&qid=1585181274&sr=8-8 (https://www.amazon.co.uk/Trio-121-Duo-Albrecht-Breuninger/dp/B0851MJJDH/ref=sr_1_8?dchild=1&keywords=scharwenka&qid=1585181274&sr=8-8)
Well spotted, that man! A treat in store, no doubt.
Soundbites now available here - certainly seems to be a "must have" for me! https://www.jpc.de/jpcng/classic/detail/-/art/kammermusik/hnum/9727330 (https://www.jpc.de/jpcng/classic/detail/-/art/kammermusik/hnum/9727330)
Excellent. I have been really enjoying the recent Toccata CD of his piano music, so this is also a must buy for me.