Hi Baxter,
Your vase/ lampbase was made by Feigl & Morawetz, Libochovice, in what was then Czechoslovakia, and is from a range of nice quality vases and figures the designs of some of which are attributed to Karel Zentner. I don't recall the pattern number for this vase but it is shown in 1950s Libochovice catalogues so should be easy to find. Not sure how long these were made for but suspect they were introduced mid to late thirties and made at least until the late fifties.
Internal illumination is not unusual for lamps of this type: the Jobling B1,2,3 lamps came with a bulbholder in the base and I'm sure Monart and WMF lamps were often similarly equipped. I use 3W LED bulbs inside my Jobling lamps to keep them from getting too hot.