> Thank you for making clear for me this very important issue !

Haha, you had me wondering there for a minute. "Hmmm, what
did Lucian see that I missed ?". Now, the tricky bit is when data
from different sources suggest a choice of two or more pin-outs.
The base is easy to find. Google for "testing transistors"

eg http://ourworld.compuserve.com/homepages/g_knott/elect56.htm

A multimeter that can measure Hfe is very useful, as a transistor that
may appear OK resistively may have low gain and not work properly.
Although one of my meters doesn't guarantee against damage if the
transistor is incorrectly orientated in the socket, so I don't use that one
on unknowns

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