Yes. A 1900 is a 1900, it doesn't matter what is on the chamber. The type of grip is determined by the configuration of the mainspring, and all 1900s have a flat mainspring.
After I posted this answer, I realized that the question that was being asked may not have been about the physical configuration of the grips but the markings. The purpose of the photos is to show how the grips are machined...the markings are another topic entirely.
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If it's made after 1918...it's a reproduction
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