One small detail to finalize everyone's great advice, look at the tube - in pic 2 it looks like there are no threads . I have never taken a gen apart, but I can tell you that with the crown pulled out on a gen SMP you will not see threads on the tube (at least on my 2264 and black bond quartz they are somewhere else). The reps have a typical tube with threads.
+10 to what everyone else said.