retro Kona curve canti brakes set

[guybe]

http://cgi.ebay.co.uk/Old-Skool-Kona-Cu ... .m14.l1318

 

[dyna-ti]

appears to be no springs or associated bits
This someone on here,?too many goodies not to be

 

[Rally_cat]

I'm not familiar with these, does anyone have an idea when abouts they were released?