Chris briefly mentions in his CCGB book that there are 2 obverse types for arabic 1 1887 double florins and that both are believed equally common. These would be dies 1b and 2b, the "d" of dei either points to a bead or a space, also the cross on the crown either points to a bead or a space. i have just 1 coin that is 1b but i have 5 of 2b, does this suggest that 1b may be scarcer?. also looking at the london cgs site, they quote davies 540a for the 1b coin, which is odd for 2 reasons, 540 is the number for a roman1  coin and also my copy of davies doesnt mention this variety. my book is edition 1 is there a later edition that contains this information? spink or esc dont mention at all