Xtal is "Crystal", an early version of the ceramic phono cartridge that used a piezo-electric crystal: a genuine crystal of potassium sodium tartrate. The salt is hygroscopic and did not last. The ceramic using barium titanate became the universal piezo material of 'crystal' cartridges, still used today.
Mag is obviously Magnetic, a moving-magnet phono catridge.
A & E would be Antenna and Earth, for the radio tuner.
The tube list says Sansui offered the FM-7 tuner in 1957. They also offered preamps with tuners but no mention on it being AM or FM. I have a FM-5 that unit came out in 1958 I believe