Hi the_frog,
thanks for your answer. I found a model kit site, where the ORP Blyskawica is shown in late war (1943-1944) condition. It shows the 285 6 Yagi Antenna fire control radar on the bridge, a 290/291 radar antenna on top of the mast and probably a 271 radar at the stern. Please take a look:
http://smmlonline.com/articles/blysk...lyskawica.html
Maybe the 290/291 Radar replaced an older one...
Greetings