Teac head set model unknown rec play erase 53786011 50664600 From the original data I

From the original data I have

They have a nice Retro feel these meters and are no longer made so suitable for

its a common problem In all of the Tascam and Teac units

I have found some variations of this board with less components or missing an opto unit

Teac head set model unknown rec play erase 53786011 50664600 From the original data IA set of heads , but I do not know from which machine, they have not been lapped as that would make them too expensive, though I can get them done if needed. no head gaps visible. These were interesting as they used a 4 track head in a two track unit using just tracks 3 4, never seen that before. May have been used in other units around this time