...to strike on April 17, Czech Radio said on Thursday.
Skoda is the largest Czech company with sales of 203.7 billion crowns ($9.80 billion) last year, the country's largest exporter and a key customer of dozens of parts makers.
The management offered a 10 percent base wage rise after a series of talks, plus a rise in bonuses and other benefits raising overall pay by about 13 percent, but the unions have demanded more.
The April 17 strike was earmarked as a "warning" ahead of possible further labour action, the unions have said. Union officials were not immediately available for comment.