[Bosox Blair]

Style 4

The flip is identical to Style 3. The difference is with the slab - there is now an addition. Now, if you look very closely at the left lower front and left lower reverse of the slab, you can see a reversed numerical character which cannot be felt on the outside of the holder. (It appears to be a raised symbol, but raised on the inside of the slab. I doubt I could capture this with a scan.)