That brings back memories: When my folks went back to Slovakia in 69 to see the relatives (my families come from Rakovec and Kamionka - hope I got the spellings right), I asked them to try and pick me up one of the 531 tubed bikes. No luck, dad was able to find a seller, but couldn't find anyone in the government bureaucracy who was willing to take the time to do whatever the bloody paperwork was needed to ship one over. Even having an uncle who was a minor Communist party official didn't help.
Still would love to own one, unfortunately the one's I've seen on eBay have been 58cm frames - for the $250.00 being asked they were a bit tall for me. Have picked up a few parts from the guy who was selling them, and a Favorit seats are on virtually all my vintage bikes. Heavier quality than a Brooks, and half as expensive.
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Syke
“No one in this world, so far as I know — and I have searched the records for years, and employed agents to help me — has ever lost money by underestimating the intelligence of the great masses of the plain people. Nor has anyone ever lost public office thereby.”
H.L. Mencken, (1926)