Old wurlitzer transistors A7607

[iTzALLgoOD]

  I was going through an old organ someone had donated to me and found 4 ?transistors? marked A7607 / EP1844A.  I tried a search which usually works and came up fairly blank.  Anyone here know where I can at least cross-referance these things to see if they're  worth making a project with them? 
  They are attached to some small heatsinks and there's a transformer in the chassis make me wonder about the power output af them.