I had noticed this cross of the Allegro site the seller was a well known Warsaw dealer. I did actually download the photos from the site for reference.
The MCC was awarded to Kapral Juliusz Serafin, Born in 1922, Army Number: 1922-171-III, 12PULP, he ended the war as a Podporucznik in the 7 PUL Lub along with a KW.
p.s. I sincerely hope that the MCC and owner are reunited soon.