In 1977, Opa was interviewed as part of a study on Mennonites in Niagara done by Professor Baar at Brock University. The interview is in German; a summary is attached.
Will post English transcripts when they’re available.
Judy and I listened at Brock a week ago. I hope you are as touched by hearing his voice as we were. No doubt it’s our Opa even if we don’t understand the exact words. About half way through there’s a woman’s voice too which we think is likely Oma.