The 6 in 643 is number of rows. The 4 stands for
polymoss Guest Aug 27, 2002 #2 Drummers' right. Carrying on to the new 90 series the last numbers: 0 = 20" rows (1290) 1 = 22" rows (1291) 2 = 70CM_75CM metric or 28" rows (692) 3 = 30" rows (893) 4 = 36"_38" rows (894 - 40" not availible from factory)
Drummers' right. Carrying on to the new 90 series the last numbers: 0 = 20" rows (1290) 1 = 22" rows (1291) 2 = 70CM_75CM metric or 28" rows (692) 3 = 30" rows (893) 4 = 36"_38" rows (894 - 40" not availible from factory)
