Here is a group of insulators I picked up over the weekend from an add on Craigslist. The larger ones are JD U-872s and Pyrex CD 325s in both clear and carnival. Most of the smaller ones are Lapp U-459s and U-480s within the 1927-34 date range. There is even a Westinghouse composition cabletop in there too. These would have come off of the old Conowingo Power Co system in northeast MD. The U-872s were on the 34.5kv lines coming out of the Conowingo Dam.