id for chinese clay teapot

by jackie
(halifax. westyorkshire)

Hi peter. could you please give me any info on this tea pot. the colour is a dark chocolate colour with a lift out strainer. the handles I think are brass. there is a large round mark on the bottom. and another smaller mark in side the teapot lid. could you please tell me what the marks mean. and the age if possible. I think this is made of clay. Thank you Jackie.