An April 2016 release:
Piers Lane and the Goldner String Quartet have returned to the studio once more, this time to record the exuberant Bruch Piano Quintet; also included are his String Quartet No 1 and a set of Swedish Dances for violin and piano.
http://www.hyperion-records.co.uk/ym.asp?ym=2016_04 (http://www.hyperion-records.co.uk/ym.asp?ym=2016_04)
... which string quartet no.1? The Op.9 in C minor or the recently-discovered early quartet ("0" but maybe they'll now be renumbered, though without the composer's permission/imprimatur, unlike a better-known 20th-century case (P.H.)?...)
I imagine it'll be the official No.1, otherwise the blurb would have mentioned something about the newly discovered earlier work.
I vaguely remembered there was now (is now - release date given as January 1, 2016) a recording of the early quartet, but now I do see it listed @ Amazon.com (Diogenes Quartet, here (https://www.amazon.com/Bruch-Complete-Quartets-Diogenes-Quartet/dp/B019CFUCB0/).) My mistake, sorry...
It would be churlish to complain of another addition to the meager Bruch chamber music discography, especially one as well played as this. Still, the 1999 CPO disc remains a delight, and the most pressing need is for a disc pairing the two late string quintets.
And even that cpo disc isn't the only one pairing the 2 published string quartets, not that one begrudges rare Bruch extra innings (or whatever the expression is.) I agree too that a disc offering the two string quintets together rather than separately would be good. (There are two recordings of the E-flat quintet, one commercial, one live on YouTube- have only heard the latter so far. Seems quite good. Have probably mentioned that many too many times, sorry!)