White Metal-Silver Repousse' Footed Salt & Pepper Shakers/Dutch Scenes/Unknown Maker-Patent Aug.23 29'-23'?/1800's or 1900's ?

Here's a pair of nice heavy white metal with maybe a bit of silver, salt and pepper shakers. They have Dutch scenes in repousse' on four panels around the outside, sitting on four curved feet. Three of the feet have info stamped into them, but are a bit difficult to read. One says USA, another #2312 and the last says Pat. Aug. 28th maybe 23rd and the number 23' or 29' for the year. Could be 18oo's or 1900's. The fourth foot is blank and there is no maker mark. The tops each have different size holes for salt and pepper so they are not identical and are a true pair. -Mike-