Reference Zumstein Catalog 2015.
The Left stamp looks somewhat similar to the 2S/2L stamp which is on white paper with red lines in the figure vertically or horizontally.
The right stamp looks like a much trimmed 4L where the header is missing. It is on green-yellow paper.
No size of stamp was given.
These look to be forgeries (reprints?) when compared to the catalog samples. On the 2S/2L the word Zurich is not centered and the side columns do match originals. On the 4L the bird's wing is far from the crest edge on this stamp compared to the original. The bottom of the crest does not have the same contour as the original.
JMHO

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