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Note Spacing
Holes / Keys Per Inch
Exact Ratios
Conversion Chart
Other Information
Unknown Spacing

Note Spacing

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Holes / Keys Per Inch

less than 1 per inch

1 or more per inch

2 or more per inch

3 or more per inch

4 or more per inch

5 or more per inch

6 or more per inch

7 or more per inch

8 or more per inch

9 or more per inch

Intona
Lucia

10 or more per inch

Aeolian (116-Note)

Roller Organ (Grand)

Exact Ratios

1.88
1.89
2.00
- Melodette
2.50
- Roller Organ (Grand)
2.90
2.92
- Little Dot
3.33
- Roller Organ (Gem, Concert, Chautauqua, etc.)
3.45
- PianoLodeon
4.00
4.11
- Piano Melodico
4.18
- Organina Thibouville
5.00
6.00
6.50
- Ariston (24-Note)
- Herophon
6.74
7.26
- Ariston (16-Note)
9.30
9.60
- Lucia
10.00
- Roller Organ (Gem, Concert, Chautauqua, etc.)
10.16
- Magic Organa
10.60
- Ariosa
- Phoenix
12.00
- Aeolian (116-Note)
20.00
- Roller Organ (Grand)

Conversion Chart

per inch	per cm	in spacing	cm spacing
1.88	.740	.532	1.35
1.89	.744	.529	1.34
2.00	.787	.500	1.27
2.04	.803	.490	1.25
2.50	.984	.400	1.02
2.90	1.14	.345	.876
3.33	1.31	.300	.763
3.45	1.36	.290	.737
4.00	1.57	.250	.635
4.11	1.62	.243	.617
4.18	1.65	.239	.608
5.00	1.97	.200	.508
6.00	2.36	.167	.423
6.50	2.56	.154	.391
6.74	2.65	.148	.377
7.26	2.86	.138	.350
9.30	3.66	.108	.273
9.60	3.78	.104	.265
10.0	3.94	.100	.254
10.2	4.00	.098	.250
10.6	4.17	.094	.240
12.0	4.72	.083	.212
20.0	7.87	.050	.127

Other Information

Additional identification data (especially for larger organs) may be found at:

Unknown Spacing

spacing/home.txt · Last modified: 2011/01/24 11:59 (external edit)