May I be the first to welcome you to the Forum, with regards to your Grandfather Kapral Podchorąży Marian Tomaszewski (Podchorazy = Officer Cadet)
The entry in the Recipients list is as follows, when awarded the Monte Cassino Cross His details were as follows :
Kpr.pch. Tomaszewski Marian 1922/53/III MCC 30894 P6Panc (6th Armoured Regiment, 2nd Armoured Brigade).
I hope that this answers your question.