First post hope this is wright Help. I am looking for some advice on a pair of marching side drums and a bass. They are made by henry potter & co of London, I think around the turn of the century, The Body is made of What looks like Brass and the skins look like some type of animal skin. they are painted in military stile red and blue with fope tentioners, can anyone tell me where i can get some more information or a valuation.

thankyou