You're right - I was being lazy but the site which I would normally use has an almost useless search function. However, it just worked. Mind you, I got a lot of suggestions concerning Spongebob Squarepants.
The caption for the photo I posted said 1957 but one archive reckons 1958 and that was the first Krab, model 700 but referred to in the Polish Championship as 75. This was designed by Jerzy Jankowski, driven by Wladyslaw Paszkowski, and powered by a Royal Meteor 700 motorbike engine. Later cars were fitted with Triumph 650 engines.