Great pic! I don't mean to be a wise-dame, but to me, it looks like a candid back lot shot, during the filming of 'Slippery Silks.' Take a look at the 'fitting room' scene with Symona Boniface, and the scene right after that, where he runs out onto the stage and loses his pants; he's got that same little pin cushion on his arm, the cut of his coat is the same, and of course, the long shirt. He was probably just taking a (smoke) break and had taken his tie off when this pic was snapped. Well, just my two cents...
