Paris Metro Stock

The 2 Letters Determine the category of Stock as follows
MP
Rubber Tyred Stock
MF
Steel on Steel
The Digits determine the year the stock was first ordered.

MP59

MP59 Train on Line 11 at Châtelet
Operated on lines

MF67/MP73

MF67 train at Gare du Austerlitz on Line 5
operated on lines (MF67) MP73

MF77

MF77 train at Invalides on Line 13
operated on lines

MF88

MF88 Train at Louis Blanc on 7Bis
inside a train of MF88 stock.
operated on line

MP89

MP89 arrives at Bastille on Line 1
operated on lines