Thanks for the correction Stew. Yes! still certainly a good age.
There is every possibility Christine that It could be a postcode. Who in there right mind would do that I wonder! I want rule out that it could possibly be an authentic mark though, but will certainly bare in mind your thoughts. Postcodes were only introduced from 1957, I think. I am not able to match an area to the markings using different variations from what I can just about read. If the markings are not authentic, I suppose the markings can be easily polished out as they are not deep. I have noticed another mark, a vertical etched line with two horizontal lines going across the middle. My first thought were Nancy Daum, as the markings look very similar. I am not sure whether Nancy Daum would make this type of vase

. If so, is there any possibility that Nancy Daum assisted in the design? It just seems very strange, that someone would go to the trouble of making these marks. Surely this would indicate that this vase was of some significant importance, don't you think?
Marks are sometimes found on the enamelled ones, but not usually this sort.
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I have looked at the Harrach vases and can see the similarities, especially paying attention to the supports and filigree. Couldn't help myself to look at the other wonderful selection of glass. I've included this site to my favourite collections

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I've tried taking natrual light pictures of the potil area, but the weather has not been too good and the quality of pictures taken were of poor quality, so I will attempt again over the weekend.