Hi, yes I agree. The mark on the base of the teapot, at first glance, appears to be the town mark of Amsterdam. Why didn't you show it in your first mail? Always show all marks in one go. However we would expect to find on the base, next to the town mark, a maker's mark and a year letter. The marks on the rim of the lid are not clear, unknown to me. If the marks do not make sense we call it pseudo or fake marks, or tampered with.
Below the proper marks on the base of a silver tea pot made in Amsterdam 1742 by Jan de Vries;
"Camel" stoneware teapot, Staffordshire, c. 1750https://en.wikipedia.org/wiki/Castleford_Pottery