09-20-2012, 11:24 AM
Jens,
There is not a clear limit between the two types. The changeover took place somewhere about 6300, but Mondvor OL are known in the 8xxx and 9xxx range.
Here is a table from Durov's book about the screwback OLs.
Marc
There is not a clear limit between the two types. The changeover took place somewhere about 6300, but Mondvor OL are known in the 8xxx and 9xxx range.
Here is a table from Durov's book about the screwback OLs.
Marc












