This SBU-1 (9815) photographed about four years after the SU-2 I posted in a earlier installment. (here)
Chance Vought photo of SBU-1 9815 on April 10, 1936.
The aircraft is Admiral Blue with Aluminum tail surfaces. It differs from a standard SBU-1 having wheel pants, a rank placard holder on the fuselage side and changes to the rear cockpit. Unlike the SU-2 photos there is no hiding the tailhook on this beauty!