Hi Fern - welcome to the forums. The mark in your first pic is the Simpson, Hall, Miller/International Silver knight's-head, their dresser-ware production codes were typically prefixed with a 'C'. The image of the marks on the comb is just too unclear - would be best to try and take a better picture, and since you believe it to be a different mark, please start a new post for it rather than adding to this one.
~Cheryl
American Marks - I
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