Hi,
Sorry for this late comment, but I’am new on this forum.
If it can help, I have a 1976 Mehari and the windscreen has square angles and an aluminium frame. It’s called new model alu in the MCC catalog. ref 0600110
My version is able to fold down on the bonnet.
The old model version has rounded edges and a iron frame. It’s called « Pare-brise fixe fer ancien modèle » in the catalog. translation : « fix Windscreen iron old model » therefore unable to fold. ref 0600000
With best regards
JC