I like your coin. As for the grade, GVF or NEF (British standards) seems okay. Everyone has their ow point of reference on these so I will share mine. The 1891 and 92 Florins are tough in higher grades. I just do not see many MS examples. I think there is somewhat of a disconnect with collectors and a coin such as yours. This date with this look just does not capture the attention it deserves. So this observation may account in part for the catalog value which is higher than how most collectors value the coin. I would tend to believe that this example should easily fetch 120-130 pounds if not more. Catalogs are helpful, however, they are guide with some valuations that are high and others that flat out miss the mark. I would not rely solely on a catalog to value a coin like this. I would consider the surviving population and the chances of finding a better example. Not sure this helps, but hopefully it provides a slightly different perspective worthy of consideration.