yup, i don't think we can track the dating of the fernandes guitars via their serial kasi hindi naman ganon ka-rich yung history ng fernandes unlike sa fender or gibson or martin guitars. well at least we have an idea kung anong henerasyon ng fernandes yan, yung serialled ones vs. the non-serialled fernandes guitars. pero medyo makukulit din yung mga hapon eh no. hindi din yata talaga definite kung ano ba mas bago o mas luma/vintage, yung serialled or non-serialled, hehe. so if anyone can shed light on this matter, by all means... hehe