I have come across a sun roof cut-out from a 69 912, but this type of sun roof is all manual? It is a lever under the roof section which you slide the roof back an fourth or fix the roof in open position with. I have never seen option like this before, not in any books, option brochures (I have 1966, 1967 and copy of 1969 edition).

Does anybody here know something about this? The roof look original with pop up spoiler etc.