Random Question: is the lift crystal, the Mark IV-D, is that pronounced "Mark Four Dee" or "Mark Four-Five Hundred"?
I like it and it could suggest a roman history to this new world. (the above being a reference to roman numerology)
So, If there is a Mark IV-M would then that suggest it was in the vat for 1000 years. Or Mark IV-C for 100 years.
Roman numerals I, V, X, L, C, D, M
1, 5, 10, 50, 100, 500, 1000