Case International Ignition Key, 

For  856, 956, 1056, 1255, 1455, 385, 485, 585, 685, 743, 745, 785, 844, 845, 885,  with XL Cab, without digital dash.

And 5130, 5140, 5220, 5230, 5240, 5250,  without digital dash.

Please compare with another key if possible, some earlier keys had teeth on just one side, these are obviously on both sides & therefore will not fit some ignition switches.

(as yet we are unable to source the other type of key unfortunately)