In this lot I purchased recently had some really neat lag spool and wireholder insulators on them. The two large or Primary Lag insulators are not marked but the chocolate brown one on the right is a Lapp Insulator Co. product. I have a brown and a caramel colored ones marked Lapp and are the same shape. I have yet to find a catalog page showing these listed or any other wireholders by them for that matter. The three spool, Single spool and Swinging Knob spool lags were made by Line Material Co. The spools on all are marked with a recessed embossed triangle in a circle. The three spool one had a broken spool in the middle but luckily I had a matching spool in my collection and fit perfectly when I cleaned it up. I found a catalog page showing these single and triple spool applications. A lot of these old hardware items a very tough to find.