It looks like a minute repeater
so I shall guess the 5531R since that is the dream of many purists!! Then again it could be the 5178G or 5078G! Yes, I know I am cheating
Maybe easy to guess but definitely not easy to be had, for me at least
A piece of art indeed.
In that case,
I think your need for the 5531R is greater than mine so you may have it first!
