I must admit that I didn't know these great Blue Note reissues until recently...
QUIEX SV-P Blue Note Series by Classic Records US
Yes, it is true...
The vinyl has Deep Groove and Flat Edge disk.
The mastering was done by Kevin Gray.
The sound quality is really really great!
I don't know about the US or any other countries but here in Japan, It is difficult to find these great reissues on the market.