Now that I've got the paperwork in front of me....here's what JRF Magnetics installed in my RS-1500 headblock:
(1) - 1/4 track playback head, Panasonic RPB-065 (560mHy, 400 ohm DCR)
(1) - 1/2 track playback head, Tascam 5378301000 (370mHy, 500 ohm DCR)
(1) - dummy erase head
(1) - dummy record head
The assembly was optically aligned, the guides were rotated, and the selector switch was cleaned....all for less than $600.00.
Mike