In no perticular order ..
Grey BHK / Note the thickness of E28 first volume (mechanical).
Orange BHK / "Ausgabe" is just a difference of language
Some BMW little handbooks /
-Upper left the ones (BMW Cars and bikes) costed 5 euros at the BMW Museum and gave all models with specs and dates.
Maybe still available overthere or on the net.
But the most interesting are those parts service booklets (given to every new staff of the parts shop).
Among various datas of the service, it provides ALL BMW ( also bikes) chassis numbers, year, dates of 1rst and last C/N , factory codes , ccs , power. All that lacks in the previous booklet.
Of course, everything now also available on the net (But we're in the 80ies).
More 50-60 brochures /
The famous BMW big 8 white book.
Warning, if you to buy one on the web, check this transparent page .
Reproduction are everywhere on the market ....and expensive.
Prices list / German / 06/58 , 02/59 and the US.
10 500 USD for a BMW 507 ????? Give me 2 !!
Yes, but we're in april 1959...