Your tip was a major help. I had been doing searches using only 'SB2C'. When I searched on 'SB2C-1' I found pics of the three-blade prop Helldiver.
>>I have VB-15 flying from Essex under the command of Lt. Cdr J.H. Mini with -1Cs during the Marianas Campaign, then with -3s at Leyte three/four months later.