A comment on my posting on the 24th, “A Swiss thread in Paris”, about a handsome Zwicky & Co. building on the Boulevard de Sébastopol in Paris:
The building was used as sales office for Zwicky [silk] sewing threads until 2000 and is still owned by the Zwicky Family.
This from one Peter Zwicky, from a Swiss e-mail address. Now, there are great many Peter Zwickys in Switzerland, a fair number just in the Zürich area alone — one of whom (cellist Peter, son of Conrad) I’ve mentioned in passing in postings on this blog. (Zürich is relevant because the headquarters of the Zwicky sewing thread company are in Wallisellen, in Canton Zürich not far (about 5.5 miles) from the city.) I thought this might be that Peter, but no, he’s an executive in the silk-thread Zwicky & Co.
In gathering information about Silk PZ (as opposed to Cello PZ), I came across another notable Züricher PZ, an earthquake specialist in a Zürich firm of consuting engineers — Earthquake PZ for short.
Then, as an unexpected bonus, it turns out that one of Silk PZ’s daughters is the Joëlle Zwicky (of IWC, the International Watch Company in Schaffhausen, Switzerland) that I posted about on 6/6/18, in “Swiss watchmakers”.
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