As I recall the seats in the B707 cockpit, the jump seat was behind the Cpt and was fixed, no adjustments at all. It would, however tilt forward to allow access to lwr 41 via the grate in the floor immediately behind it. The N/O table was immediately behind that and his seat moved up and down and laterally only. The FEO seat moved up and down as well as laterally. It did not move fore and aft until the late model -300 came on line. Those seats moved diagonally towards the Cpt seat as well as laterally.
It got kind crowded, hot and stuffy with five of us on a hot day ex KHI or some place like that.
That was, of course, on the opposition's aircraft.