Sentinel IV ????!!!!
Sentinel IV is what I call the Australian Cruiser Mk IV. A 17lbr version of the 25lbr armed AC Mk III Thunderbolt, that in turn was a partial redesign of the AC Mk I, the Sentinel proper. As the whole AC line was a series of minor to medium redesign efforts, rather like the M4 Sherman line, I tend to call them all Sentinels, rather lazy of me.Lost in translation?