The kit Seabee1526 is building is Dragon's 6394. This is the earliest version of the Ausf J armed with the Kwk 39 L/60, it does not include the later added spaced armor applied to the front hull and mantle. These vehicles were first issued to the DAK in March of 1942. These vehicles are not to be confused with the May/June deliveries of Pz.III J, which were fitted with the additional spaced armor, in addition to the L/60 gun. (See photo caption in Jentz's; Panzertruppen, Vol I, page 180.)
Since order HM 1942 #315, changing the Tropen Scheme to RAL 8020/7027, was not issued until March 25th, 1942, it is most likely that these first L/60 armed Ausf Js arrived painted in the earlier scheme of RAL 8000/7008, as existing supplies of the earlier Tropen I scheme would be used up before switching to the later Tropen II scheme, and they arrived well within the time frame of this transition.