New York Police with Lugers

[Mike B]

Greetings,
I recently picked up this interesting photo. Initially, I purchased it just because I thought the two Lugers in a vintage picture are kind of cool. However, something caught my eye. Take a look at the Luger in the Officer's left hand. Take a closer look at the muzzle. It apprears to me that it is larger than a standard 9mm barrel. Could this be a 45 he is holding?
Also, any idea what the other object is in his left hand?
Mike