I wrote this a week ago when I'd spent ages working on the code. I did set up the M60 as a medium, not a heavy, to match the tanks encyclopedia. I'm fully aware of where it's obtainable from, and what it is, it's just that
WG decided to remove it from the tanks data in the API so I had to set it up manually. They are definitely in game - King has one, which is how I was able to determine it's
ID number in the API and recreate the missing data. I now need to track down the internal API
IDs for the Pz IV Hydraulic, the Pz V/IV Alpha, the T-23, T-50-2, WZ-111, Type 59 G, KV-220 Beta, and KV-220 Test (note the KV-220 available in-game now as a premium is different to both of these other KV-220s). All of these tanks have been marked as "no longer available" by
WG and so removed from the encyclopedia API, yet there are players who still have them. I'm trying to find some players who have these tanks so I can use their API data to determine the tank_id values, and as I find out what they are I will manually add them into the tanks data.
Mastery icons now added to the stats page.
UPDATE: tank
IDs tracked down for KV-220 Beta and Pz V/IV Alpha and details included.