No much description for this page. There 'superexceeded' material in the internet explaining about this 12-EDD.
Step
|
Purdal size
|
Cent size
|
01
|
825
|
100
|
02
|
1650
|
200
|
03·
|
2475
|
300
|
04
|
3300
|
400
|
05·
|
4125
|
500
|
06
|
4950
|
600
|
07·
|
5775
|
700
|
08
|
6600
|
800
|
09·
|
7425
|
900
|
10
|
8250
|
1000
|
11
|
9075
|
1100
|
12\0:
|
9900\0
|
1200\0
|