Circular puzzles always attract more attention than those of a more conventional shape, whether they are straight reproductions of paintings or montages of several paintings. Unfortunately, in my thematic jigsaw collection depicting steam railways, I have very few examples of a circular shape.
Here are two, however, and the first one shown is a favourite in my collection - a Waddington's 500-piece jigsaw from the 1950's. The montage style puzzle comprises five different express trains, all displaying famous headboards. They are pictured in separated, equal segments within a circle; they are 'Flying Scotsman', 'Golden Arrow', 'Royal Scot', 'Yorkshire Pullman' and 'Cornish Riviera Express'. Its shape places it in a minority class immediately and always invites attention, accompanied by head and neck contortions when viewed. The artist is unknown to me.A Malcolm Root original painting was used as the source for the second circular jigsaw - a 500-piece straight reproduction example from King International. The puzzle depicts a bridge carrying 
a steam train over a busy high street. The locomotive appears to be one of Sir William Stanier's large 2-6-4T tank types built from 1934. An interesting feature of the puzzle is that the double-decker bus carries a destination that includes 'SHOEBURY COMN'. Before she was broken up for scrap, Shoeburyness shed was the last home for tank engine, 42516, featured in the puzzle. A bus, lorry, car and people all vie for space beneath and around the bridge, in the bustling town centre of Southend-on-Sea.
a steam train over a busy high street. The locomotive appears to be one of Sir William Stanier's large 2-6-4T tank types built from 1934. An interesting feature of the puzzle is that the double-decker bus carries a destination that includes 'SHOEBURY COMN'. Before she was broken up for scrap, Shoeburyness shed was the last home for tank engine, 42516, featured in the puzzle. A bus, lorry, car and people all vie for space beneath and around the bridge, in the bustling town centre of Southend-on-Sea.