Although They appear to be Kralik at first glance, the red dots on the tadpoles are not indicative of their production as I know it. Additionally, the image of the base shows what appears to be concentric circles in the molded pattern, which is also not indicative of their output as far as what I have seen and have images of.....
I'll check with Alfredo and see what he thinks....
Craig
Edited in: After checking with him, I simply have not seen the dots before and Al states they are a marker for Kralik production...... I stand corrected, and have learned something new today.... making it a good day......