Shottky diode bridge for 6o Hz any guess why?

I've been asked to reverse engineer a product that has a very unusual DC
power supply I'm trying to understand
It has a power transformer for the line with two secondary windings with a
shottky diode tying one end of each together
The outer ends of these windings are then connected to a 4 diode full wave
bridge made of more shottky diodes then to a conventional voltage regulator
..
I'm trying to understand why one would not simply tie the two outputs in
series and then feed a conventional full wave bridge
The output of this power supply is 12 Volts
the diodes are rated 8 amps but the transformer in my opinion is not capable
of that current as it is only 2"X2"X2"
Any opinions are appreciated
Thanks in advance
Bob



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