IN-GAME PREVIEWS NOTE: Not every vehicle shown; Check the above list!
EDIT (6. Aug 2019) - Turns out both taking and organizing 3 preview images for every single vehicle (with there being over 100 vehicles by this point [if you include addons]) may not have been the greatest idea, as it has proven to be rather time-consuming! I am considering dumping a bunch of preview images into an Imgur gallery, but for the time being, you will have to see most of the dakka in-game on your own. My apologies.
Still, I have some images from earlier releases below, if you'd like to check them out.
AMX 13 57 / AMX 13 57 GF
B-C 12 t
AMX 13 90
Pz. IV H
Progetto M35 Mod. 46
Type 5 Ke-Ho
Type 5 Chi-Ri
25TP KSUST II
Vehicles listed by Update
Version 1 (19. June 2018, 23 vehicles)
France: AMX 13 57, AMX 13 57 GF, B-C 12 t
Italy: P.43 Bis, P.43 Ter, P.44 Pantera
Japan: O-I Exp., O-I, Chi-Ri
USA: M4 Improved, T14, M6A1, T20, T69, T32, Chrysler K GF