Book Collector

Needs Help

to identify the origins of the Raisu Riitta -series published in Finnish comic-magazine Sarjakuvalehti in issues 1950:20 - 1951:08

"Raisu-Riitta" was science fiction -adventure comic. Main characters were a young girl and his uncle. Uncle has invented time machine and Riitta uses it to transfer herself and her uncle to the times of King Arthur. I have been unable to find any foreign comic this has been translated from. I need help!
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