This formation includes a couple of "What-If" units at certain time periods.*
*
The Semovente 149 had only one prototype finished and in use before the Armistace.  It is not known if the prototype saw any combat, but it was capable.  No production units were ever finished, although production had started.*
*
The Semovente 155 is a post-war, WWIII What-If extension of the Semovente 149 idea.*