This is a very old imported bonsai of the Malus sieboldii , Japanese crab apple, species.
Having been in this country for many years it has undergone major transformation and is now a hollow trunked specimen with the tree formed by a single lower branch. Certainly the detail of the carving of the hollow trunk can be improved as can the rudimentary branch structure although this is not a species that will ramify anything like a maple. The real beauty of this as a bonsai is the spectacular flowering , excellent last year but not quite as good this and finished when the photo was taken. It is 60cm. high with a spread of 40cm. and across the base that ancient looking trunk is an impressive 12cm. The hand-made oval glazed ceramic measures 40x34x8cm.
UPDATE TO DESCRIPTION
Since this tree was originally posted there has been a major change. The old main trunk has total decayed away leaving what was effectively a low branch or possibly a root sucker to grow away to form a new trunk. I have just left the original text to give a full background to the bonsai. However, what remains is actually doing very well as the recent photos illustrate and it, like many trees this year, is full of flower. The young trunk is starting to look tree like in it’s own right now. It is 60cm. high with branches spanning 40cm. Across the base the trunk measures 5/6 cm in diam. Just added an up t date image of the tree in a new pot , a round glazed Chinese ceramic 32x20cm