Hello Blake88 and welcome to the forum
Well done on rescuing this radio. It seems quite unusual - it doesn't look like a 'typical' Mullard, somehow. And the type/model number (
MKZ6360) also seems quite strange.
I browsed through the 1950s Mullard models listed on RadioMuseum and, like Stuart, spotted the similarities with the
MAS256 and
MAS257.
An image search led me to this
South African auction site, where you can see some interesting photos of a radio very similar to yours. The chassis looks weird with that big hole in the middle!
Given the link with Philips, one would expect an 'equivalent' Philips model to exist.