help with a walter and hall teapot

I,m trying to id a date for a walter & hall teapot I have
there are no silver marks but it has this on the bottom
(sorry cant download photo have tried and tried to make it smaller alas to no effect!)

CICLE WITHPATENT NO 3246
w & H flag whose flag pole goes right through all the writing (havent seen this design on the internet anywhere)
RD 134707
618

5
78

could anyone help with the year?
Thank You