Proton Doubles
- Classification
- Doubles
- Place Notation
- 5.3.1.3,3
- Lead Head
- 24531 (Code: 3z)
- Symmetry
- Palindromic, double and rotational
- Hunt Bells
- None
- Lengths
- 8 rows per lead
40 rows per course (5 leads) - Download as image
- Numbers
Grid - Data Source and Copyright
- Details on the about page.
