it sounds like L. D. Berger Co. 52 No. 2nd St. Philadelphia, Pa was a Merchant selling various goods.
he was also listed as selling stove pipe.
around 1919 he was putting out a news paper once in a while called "The Sketch" and sent it to
tinners, roofers, sheet metal workers and others connected to the trades.
what it sounds like to me is he supplied material to the trades, and those pliers being used to install
eaves trough wire hangers, would fit into those trades.
just my 2 cents on this subject. have a good day.