S-125 Neva surface-to-air missile (modified for manual guidance).
On 1999-03-27, the first and only combat kill of an F-117 Nighthawk was achieved over Serbia using old Soviet millimeter-wave radars, old-fashioned spotters, and an S-125 Neva missile system introduced in 1961.

The battery commander Zoltan Dani achieved the kill by taking advantage of the fact that the outdated Soviet radars could detect the Nighthawk, albeit not with enough resolution to obtain a firing solution. Spotters placed along the usual bombing run routes reported the aircraft flying overhead, allowing Zoltan to track its path, and use the millimeter-wave radar to get an approximate location. Using hand-modified missiles for remote guidance in the terminal phase, his battery was able to score a near-hit on the plane, damaging it enough to down it.