Unfortunately, I think it's just a Normal "S". I couldnt find anything as far as varieties for this date. I looked at my Cherry Pickers Guide and the CONECA variety vista website.
27-D inverted I think is the best ones for 1927 . But I have not seen one graded maybe 1921-S I am thinking about. It hard waiting on your books and items required for this. But should be here soon.
I recently picked up 5 raw proof Roosevelt dimes for a total of $23. Here are two of them. The other three have similar toning. I am going to send in for grading -- I hope they do not come back AT.
Pardon the iPhone photos. It did just enough to show the great mirrored field and great green toning. It's off to PCGS for photos.
Wow, I'm not big into lincolns either BUT neon green toned lincolns have some sort of pull over me. I want that one! Nice pickup