No strike, but Sears' main bike supplier, Murray, was building their new plant in TN in 1956, so Sears had to find another source. They found Steyr/Daimler/Puch, a European collective that had several factories, and made a lot of things besides bikes. The imported JCH's have the country of origin at the bottom of the head badge. I believe most of the '56s were made in West Germany. Puch was making lightweight 3 speed touring bikes for them in their Austrian factory through the late '70s. A bolt through rear stay was a cheaper bike, NY importer Stelber sold a lot of them under their name, and got a bad rep for their poor durability. Stelber may have been involved with Sears as far as getting them together with S/D/P, or possibly even the importing of them. Older stories about this say the import JCH's were made by Stelber, but there's no evidence they did any manufacturing, as even their later brand, Iverson was made by CBC/Ross.