Hi there. This is my first post on this forum 
This ring belonged to my granny and I believe it is over 60 years old. We are from Ireland and part of the hallmark is a Shamrock/Clover, however I cannot find anything about it online. Hoping someone here is able to help.
Pretty tough to tell from the somewhat blurry, dimly-lit photos. But if that final mark is a “W,” that might ID it as Dublin, 1964:
https://www.silvermakersmarks.co.uk/Dates/Dublin/Date%20Letters%20W.html
The shamrock isn’t technically part of the hallmark - it might be a maker’s mark or retailer’s mark of some sort.
@JeffTucker Thanks for the quick reply. This has been driving me mad for years, so I will check out the link. A makers mark for the shamrock would make sense. I will have to do my homework and see who this could be.
Sorry for the blurry photos but the ring is so small and the hallmarks even smaller. I think the first one is a woman holding a flame, the second is a harp I think. As for the third, it is the most faded one but it could be a W.
Thanks again 
The first mark is Hibernia, which means that it’s the Dublin assay office. The harp indicates that it’s sterling, .925 purity. The final mark is the date letter.
