If you scroll to the bottom of this page, you can find the images that highlight the features on your cymbal. What mainly sticks out to me is the two dots in the dot dot dash dash are very close together (type I), but the text (R over M and A over A) alignment is type III.
It's a trans stamp type 3. The Type 1's have different lettering alignment (KMBA vs. RMAA .....and H over E is different between them)....plus you need the cross hatching inside the lettering.
Pretty monstrous cymbal for sure. If it's med thin or lighter.....pure gold.
In high school in the 1970s, i saw the Stan Kenton Big Band with Peter Erskine on drums, and Peter was using HUGE cymbals. I had never seen cymbals that huge!