This chimney is more conventional as it is completely covered by tiles. An extension with a few rows of bricks has been added to bring its top higher in order to improve its efficiency. It has to be efficient as it seems to work often !
An amazing chimney top : it is made only with two pairs of tiles which do not cover completely the chimney. When it is raining, some water must drip into the house. However, it must be very efficient as far as the exhaust of the smoke is concerned.