I have a JCM800 2203 that I would like to replace the caps on. It has an inspection date of 7-11-84. It is the U.S. version with horizontal jacks and originally had 6550 power tubes. I replaced them with EL34's several years ago and rebiased. I have found capacitor kits from a few vendors that specify an early and late version of the 2203. Their early kits contain 6 large caps and 2 small ones. Their late kits contain 3 large caps and 2 small ones. My amp has 5 large caps in. Four are located between the large transformers and 1 is between two preamp tubes. I guess I can just buy the 6 cap early kit and have a spare cap? Was there a transition era between the early and late 2203's? It also has the pots on the circuit board if that helps in dating it.