While I do not have a datasheet,
NTE quickcross has no equal,

here is some info for you (I'm not the author)

Many Asian-sourced semiconductors are marked per the
EIAJ standard
Electronic Industries Association of Japan,
which uses this code:

2Saxxxxb

2S -- a hint that it's not JEDEC

a -- the type of semiconductor, where
A = PNP bipolar
B = PNP bipolar
C = NPN bipolar
D = NPN bipolar
F = SCR
J = P-channel FET
K = N-channel FET
xxxx= 3- or 4-digit number

b = a suffix sometimes applied to designate updated
versions

Usually but not always,
if xxxx for 2A or 2B is under 500, or 2SC or
2SD is under 100, it's germanium;
else silicon for bipolars.

Provided by
Jim N6OTQ