Absolutely no idea, since I haven't any belgium catalogue. Have you? The only variety I know is L with a dot under the head (Krause mentioned it).
No sorry. The only other gold reference I have is Hans Schlumbergers European gold coin guide book. There is no mention of your variety? All it says is that there was a mintage of 1,026,103 and an additional 522,310 which were struck in 1866 but it doesn't say if there are any differences to identify the two.
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