I remember digging these up one day on an unrelated search for Gazelle-compatible chaincases. Delighted to see that one of these has made it's way to your mad scientist's lab, JaccoW.

Also looking forward to seeing how that BB gets serviced - given the corrosion over the whole thing, I can see where premature wear of a BB can become a normal thing over there. Does it have press-in cups, or is it simply press-in bearings, a-la Lambert/Viscount?

-Kurt