5,376 July Surprise Major

Donald F Morrison (no. 2233)
2345678  1  6  7
2348765  -  -  3
2348576     -  6
2346587  -     3
Repeat. 6 = - - s - - s.

Contains 384 combinations of 5678 in 5678, including all 24 each 5678s, 6578s, 8765s and 8756s.
True to all CGIKORabcdefXYZ.

Published in The Ringing World (1986, page 576).