Well I don't know too much about Mdina, but I thought Boffo left in 1973 and Eric Dobson was in charge then, but I thought Eric Dobson didn't make glass - so someone had to be making the glass and I just presumed it was Joseph Said

and as I say, Mdina have confirmed that Mr Said made this particular horse.
I agree with you the head of the horse and its mane looks very like the horse you picture you posted by Boffo and very unlike the Mdina seahorses I am familiar with, however to be honest that is not conclusive evidence is it?
It maybe that the early seahorses looked like my one because Said developed this idea from tutelage from Boffo, and gradually he developed them to become more the piece they are today?
m