ianhart: Yes, the right hand high side keys are probably just like other saxophones - Bb, C, and E3.
There were only two palm keys on the Sugal 'nino, so it does not go up to F3.
The left pinky table wasn't that clear in the Sugal photos to make a judgement about them, but given the older design of the Bb1 and B1 pad cups, I'm guessing the left pinky table is NOT like the most modern designs found these days on other sized saxophones.
This is peculiar to me because almost ALL saxophones being made today have the so-called tilting left pinky table and Bb1/B1 pads on the lower half of the tube. This is one reason why we are no longer seeing new MKVI-clone Bb sopranos, I think. Everyone is geared toward mass producing the modern design and it would probably be a HUGE hassle to change manufacturing equipment to make the older style. DAVE