I looked at my files of K and M42 lens photographs in the folder, "60mm to 79mm". I found nothing that begins with a 6; just the Pentax 77mm FA Limited, a Carl Zeiss Jena 75/1.5 Biotar in M42, and and a Voigtlander Color Heliar 75/2.5K.
No 58mm lenses, either. Paul Franklin Stregevsky
