I have a (single) blue book...
It is complete with updates through 12/71. My 1972 MY E3 is 7/71 production so it contains everything I need.
It is a very full book.
My theory is that initially the Workshop Manual "Blue Book" fit in one binder. At some point after several updates, it didn't and two binders were needed. At that point, two new empty binders were issued marked Band 1 and Band 2 and the title changed to 2500-3.0CSi (even though they still covered the E3 including the 3.3) with instructions on where to split the chapters. My guess is that this happened shortly after the 12/71 update.
Any other theories....or hopefully facts even?
It is complete with updates through 12/71. My 1972 MY E3 is 7/71 production so it contains everything I need.
It is a very full book.
My theory is that initially the Workshop Manual "Blue Book" fit in one binder. At some point after several updates, it didn't and two binders were needed. At that point, two new empty binders were issued marked Band 1 and Band 2 and the title changed to 2500-3.0CSi (even though they still covered the E3 including the 3.3) with instructions on where to split the chapters. My guess is that this happened shortly after the 12/71 update.
Any other theories....or hopefully facts even?