There were other VNAF schemes, mostly similar to yours. The checkerboard pattern is specific to the 112th Observation Squadron, VNAF, based at Bien Hoa. I have pictures of several of the planes from this squadron, but none with your tail number. A lot of the planes are Olive Drab instead of gray. The USAF used the dove gray, the Army used O.D. green. There were a few Air Force birds in green, and a few had several different camo patterns. The Army had a couple of camo patterns but mostly the green. The problem with camoflage paint was that the fast-moving jets that were being directed by the Birddogs could not see them against the foliage. The Air Force added a bright orange stripe across the top of the wing from tip to tip, and a panel behind the rear window to the vertical tail, but eventually changed them back to gray. Here's a picture I found, that might interest you, from just after Korea. The 82nd Airborne experimented with this. I say you'd have to be bona fide crazy to do it, but imagine the ride!