I have a navik windvane
in good condition except is missing the linkage piece between the upper wind vane
and bell crank attached to the grim tab unit. (was going to make one with a tent pole)I have the grim tab linkage pieces. Also the gears that lock the wind
angle are missing, but you can freely rotate the piece and perhaps a set screw or lines to control. A guy in Denmark
I believe Mr Vane is selling parts
Toyed with the idea of mounting this on my cats, but have heard they don't hold up well at higher speeds.
Been planning to list on ebay but thought I'd see if any interest here first.
Will get some pictures tomorrow.
$400 can ship