Over the last forty/fifty years Leica Pradovit projectors were apparently not made by Leica - many were, I think, made by Kindermann and some in the Zett (Zeiss Ikon) factory which was bought by Leitz. I would like to know which models were made where! Older ones certainly have a strong family resemblance to Kindermann projectors but who made, say, the Pradovit Color 2 machine? Or the P600? I would welcome any info. - or a recommended source of detailed info.