I don't know too much about porcelains, but I can tell this cable top is a fairly old one just by the top and how it is made. No stamping anywhere on it and the colour is pure snow white. Mint cond! The other cable is an almost duplicate one in crude cobalt blue with no stamping marks. Both pieces have extended innerskirts and are mint. $20 each plus $5 shipping or $32 for both plus $6 shipping.