First fighter in North Vietnamese service: T-28 Trojan–"B" or "D"?

Does anyone know if the first fighter of the North Vietnamese Air Force was a T-28″B” or T-28″D” model. Utilized by a Thai defector in 1963, the Trojan came from the Royal Laotian Air Force, which flew both models. The photo seems to show a modified “B” with gun pods and bomb racks(?), but having seen one photo, which is dark and blurry, I cannot be 100% sure.

If anyone has additional photos, data, or can take an educated guess as to which model we’re looking at, I would appreciate your input.

Thank you very much.