I've gone blind trying to find that elusive MARCEL BOUCHER MB mark on this fabulous 1930s 'real look' brooch (would you believe this was a copy of the real thing...18K, diamonds and aquas?...this HUGE?). There is a place on one stem that could well be that MB beak. It's 4.5" by 2, has openset 'aquamarines' and pave and is plated in both yellow and white gold. There's wear on the highlights, but nothing abnormal. It's in EXCELLENT original condition.