Antique C S Co. Metal Salt & Pepper Shaker Silverplate or Electroplated?

Lovely set of Vintage or Antique C S Co. Metal Salt & Pepper Shakers. These are either Silverplate or Electroplated. Unable to find much information on them. Maker mark reads “C co S 152” these are in vintage condition but are fully functional for use as they are designed. See photos for condition and reach out with any questions prior to purchase. Shipping quickly from Pet and smoke free home