Proper solid transformer, no switch mode here!
Supplies 5V DC, 10V DC and 12V DC
The 11V AC is I suspect for clock / timer use (as it would expose the 50 or 60hz mains pulse at a safe level), I've seen similar on burglar alarms etc...
Suspect the 12V is unregulated
Designed for '100-230v' - would be 100% fine for the UK as '240v' is a nominal figure, and you'll usually measure 230V at the socket.
Incredibly heavy, a classic, true vintage item for that special rebuild?