Numbering system for M67.

    1 -   295  Fagerholm numbers
  296 -   333  Extension by Murray
  501 -   999  Gilliland +500
 1001 -  4500  Eggen and Sandage I-1 to IV-500
 5001 -  6500  Montgomery
 7001 -  9200  Sanders (no + 7000)
10001 - 16558  Fu 
20000 - 20496  Balaguer-Núñez

Priority in assigning a number:

 1. Fagerholm
 2. Eggen-Sandage
 3. Montgomery - Janes
 4. Gilliland
 5. Sanders