I have the same in citrine yellow with engraved Chinoiserie in a medallion. I have it tentatively put down as Moser because of the colour and the quality - but of course it could be one of the other makers. In any case, Czech, probably 1930 - 1950s. No idea of the initials on the base of your vase - they do not really look as if it was the manufacturer who put them there; there are certainly no markings on mine. If it was the maker, then Josef Riedel jumps to mind.