Click an image for a 10X high resolution picture. It's actually better to right click and "Save target as" and open them in a graphics viewer so you can zoom and pan. They average about 1.1MB each.

This is a type A. Notice only one button. Goes side to side for FF and REW and you push in to eject. You'll find these in economy cars and small S10 pickups etc.



This is a type B. It has three buttons like the type C and is mechanically interchangable with the type C. This the main one that'll come in with the cassette holders broken from somebody forcefully removing the tape. When the belt slips, it won't eject.



This is a type C.



This is a type D. Two buttons on the side and there is a switch on the front panel for music search instead of regular FF and REW. Eject is a momentary SPST on the front panel, not mechanical. Reportedly made by Blaupunkt, you'll find these in luxury cars. While the B and C decks do disengage when you turn off the ignition, these actually eject the tape. Like the A drive, the cassette does not drop, rather the bottom ½ of the mech comes up to engage the reels. Note the motor is missing in this one.