BellBoard

2314567
2345716		s2 s3  6   [10]
2453167		3-6          [10]
7214563		1 5-7       [10]
7234165		4-5 7       [12]
20 part peal
4,6 observation bells
Use link from six 5 in course 3 to six 7 in course 4 by changing a bob to a single.
In the first part call the 4th course 4-5 S7 8 9 16-17 S19 20 21 28-29 S31 32 33 40-41 43 [48]
In the 6th, 11th and 16th parts call 3rd course 1 s5 [10] and omit 4th course