I agree with Loudthud that your cab looks like a Suntura II cab, but who ever re-did the speaker baffle must have put it in backwards. When facing the amp the top speaker should be towards the upper right and the bottom speaker towards the lower left. The speakers in your cab are just the opposit. Look at my Rebuilding a Sentura II amp/Cabs post in the DIY section to see how the speaker baffles were originally set. There should be a pic or two of the baffles without the grill cloth..
Rob