Petit & Fritsen Numbering System

Bell No.

Pitch

1/2

C/C#3

3/4

D/D#

5

E

6/7

F/F#

8/9

G/G#

10/11

A/A#

12

B

13/14

C/C#4

15/16

D/D#

17

E

18/19

F/F#

20/21

G/G#

22/23

A/A#

24

B

25/26

C/C#5

27/28

D/D#

29

E

30/31

F/F#

32/33

G/G#

34/35

A/A#

36

B

37/38

C/C#6

39/40

D/D#

41

E

42/43

F/F#

44/45

G/G#

46/47

A/A#

48

B

49/50

C/C#7

51/52

D/D#

53

E

54/55

F/F#

56/57

G/G#

58/59

A/A#

60

B

61

C8

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