victorian table lamps, plaster

have purchased a pair of old lamps about 7 in. high. they are made of plaster and have an acorn & leaf motif around the base. They are actually molded to look somewhat like candle sticks & are painted gold w/ the leaves being green & acorns orange. They have a marking of the letter "c" within a circle pressed into the base. Any idea who would have manufactrured these?

I'm sorry couldn't find it - maybe a place that deals with Victorian lightening or an auction house would know more