nhchen
Nathan
6x9: Welta Weltur (unfortunately rare) or Bessa RF with Heliar (half prized than Bessa II), both uncoated, but, if properly used, who cares?
6x6: Agfa Super Isolette or Super Ikonta III or IV
+1 Welta Weltur, I have a 6x6 model with a unit focusing tessar lens and it is very well built, very solid.
And what about a Mamiya-six folder? The lens doesn't move at all and instead moves the film plane to focus, so its very solid also.
nathan