G'day Wilbur,
The motor is Victa made but it's the Tiger / Industrial version used on other equipment like edgers ,pumps ,boat motors
etc but also used on other manufacturers mowers ,I would say your motor doesn't have Victa cast on the top front crank case.
The ICAE prefix, I have seen on HG Palmer mowers
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=34955Cheers
Max