Reggie Dixon while reminiscing with Goodwin, mentions having taken his "Pentax 1000" with him to Viet Nam. There were two Pentax 1000 models, one was the SP1000, a lower end camera with a screw-mount lens (M42) which retailed at about $100 in the early 1970s. It is doubtful that this camera would be used by a photojournalist, as it was problematical changing screw-mount lenses in the field. The newer K1000 model came out in 1976 after the end of the war and was equipped with a standard bayonet K mount and had a much larger customer base. Most photojournalists preferred K mount to M42 lenses.
Dixon claims to have worked for Stars and Stripes during the Vietnam war. Robert Gossett was born in 1954. American involvement in the Vietnam war ended in 1973 when Gossett was about 19. While that was possible assuming Dixon skipped college, where the glaring error takes place is his claim that he was with the "7th Cav" (another error) at the taking of Quang Tri. That attack took place in 1968 when Gossett was about 14.