First off i would like to say that regardless of how it was done and how much time it took, CONGRATULATIONS! Now its time for him add some mass-- b/c if e can diet down like that and lose virtually no muscle (tri's are indicative of this) he should be doing winter bulking. Now down to business: okay, let's see; what is his estimatable bf% in pic 1 and then in pic2? I have a feeling that his fat was way above average for a precontest diet to put him in contest condition (which is #2.) The average precontest diet is started (w/ normal carb levels) around 20 weeks out (and can include eca, nyc, topical yohimbine-- damn did he need it for nipples,-- clen, t3, dnp, etc. To achieve these results he had to diet extremely hard (if naturally) and usually these conditions lead to canabalism of muscle tissue (even ketosis-- if you burn past your fat intake, say "bye-bye" to a small amount of muscle) which,as i said earlier, seems to not have happened. This is preventable with very low dosages of anabolic agents, but is extremely hard to prevent naturally. Another thing to ponder: you said he was bulking, so was he this cut before and just gained too much fat? I'd say no he was not ever previously in this condition. So some things just don't add up, but still good results. Why the claim of natural; unnatural is anything outside of ordinary means which in the bb world comes down to anything not obtainable through the living process of a normal person. Techinically this includes revised diet, amphetamines, diuretics, protein supplements, creatine, bcaa's, prohormones, aas, thermogenic agents, appetite supressants, sleep aids (hey the normal person doesn't only have rem sleep-- ghb and melatonin, HGH, insulin, etc. Or natural can mean anyone who is inside of the current standards, which in bodybuilding do include the afore-mentioned claims. Words of advice: ditch the all-natural claim and don;t claim anything; people will respect you more, there will be much less controversy, and your results will speaf for themselves regardless of how their obtained.
P.S. BigAndy69, the operative words in your post are "9 months", you have a respectable claim; don't couple yourself with this.