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"This young wine may have a lot of tannins now, but in 5 or 10 years it is going to be spectacular, despite the fact that right now it tastes like crude oil. You know this is how it is supposed to taste at this stage of development." ~ Itzhak Perlman
Loop end ? The way it look's in the picture, the same fine tuner is used for all four string's and they don't appear split. They look like they are for loop end application with the E string.
Look at how Dan's have two prong's the string slip's between. I wouldn't go doing any prying on them, either call the supplier of the violin or purchace new tuner's at the music shop. They are not that expensive.
Maybe I'm not seeing something, but it doesn't look like there is a split in it. If there were string's on it originally, why would someone remove the string's then pinch them back together again knowing they would have to replace them with the same type string. There is no sign of ball end type string's ever being used, to my eye's anyway.