He made it to his 80s, not bad innings for a long and productive life...
I believe he also designed many other lenses. I recall reading about him some years back, and I wish I had kept a link to the article as it included a lot of data on those underrated little 'sleepers' of the lens world. That Zeiss glass has held up well over many decades, even if the manufacturers' quality control was at times somewhat inconsistent. The lenses even work well on today's digital cameras, but it's good to thoroughly test them, as the QC can vary greatly between two of the same lenses from the same production run.
It would be truly good if we can look up and post more information about those East German lenses.
So yes, many thanks for posting this.