Antique Original Watercolor Cityscape with Canal Signed by Brol - Late 19th Century

This is a late 19th Century antique original watercolor cityscape with canal signed by Brol. That really nice watercolor and it is in a very good condition. I believe the letters on the boat 'Brol' is the signature of artist. It is not dated or titled on the image. I didn't open the frame, so may be it has more information about the artist and this painting under the mount. It is framed in original vintage wooden frame ( the wood looks like oak ), matted and glazed.