1940s pepsi cola sign,keystone cops

[pepsipete]

Hi,to anyone reading this, I was just looking for a bit of help and advice, I have a pepsi cola sign dated 1940 in the bottom right hand corner, it has the slogan DRINK pepsi:cola 5c with two policemen on(keystone cops).how can i find out more about this item(value,original/reproduction,selling). thanx pete