Spanish 2 Reales coin 1845 KM ?

I recently acquired this 1845 2 Reales coin and thought that it was KM 526.1.  It is not large enough to be a KM 526.1.  It only weighs 2.8 grams, is 18 mm wide and is 1 mm thick.  It is very worn, but no way it could be 6.77 grams.  Any help would be appreciated to find out what this coin is.

I can make out a crowned M and CL for the mint info.

Your coin is
https://en.numista.com/catalogue/pieces34492.html

Minted in Madrid in 1845. The initials CL are from the officials of the mint Jose Luis Castroviejo and Eugenio Larra.

The weight in Krausse and in Numista catalog were wrong. I have already fixed our catalog with the theoretical weight 2.98 g.  

thanks for the help.  Nice to find a nice slot for this coin.