1 Used Working Teac 4T 2ch Play Head Reverse Direction P/N 50664510 For Teac A-4300 Reel To Reel Condition Head Has Some Wear Tested Before Removal Both Channels Sounded Clear On Playback Head Coils Resistance Is 227 Ohms and 225 Ohms Last 2 Photos Is The Location On The Mount Plate Circled In Yellow.