Lovely example of a cut ice, not entirely convinced by that signature though in my opinion.
The 'G' on glass looks like it's been done with a vibro pen and MH signatures at Mdina were done with a diamond point etcher as I'm sure you know. It's also too thick when you compare other MH Mdina signatures, MH Mdina signatures are very thin and well excuted, it looks nievely done.. That and the signature appears to be over the top of the base scratch/ shelf marks which wouldn't be the case were it done at the time of production. Just my opinion though, happy to be proven wrong!
But again, lovely example, great colour!