The first piece I targeted was the Duncan patent suspension made by Locke Manufacturing, an incredibly rare and pioneer suspension type, perhaps the first suspension type ever made. This one is in minty condition. Used locally in the Central California foothills, this is my 5th find. All have been found only in PG&E lineman collections. The 3 porcelain 2-part mulitparts in different glazes are unmarked Thomas's M-2260. All have the BJS in the base skirt. The pretty 4-part multipart is a Locke M-4325. The 2-glaze brown and blond unipart is a Pittsburg HV product.