Our model Siding Spring symbolizes the orbit characteristics of the comet Siding Spring by the retrograde display of the retrolaters. The operation of the retrograde seconds takes place in two merging periods. When the starting second is over after 30 seconds the other second hand automatically runs from the thirtieth to the sixtieth second. When the sixtieth second is reached the procedure begins anew. It is a real pleasure to watch the passing of the time in this special form. The Siding Spring can be ordered in different movements crafted versions. By order we craft the Sw07 with the Schaumburger 3/4 bridge or with engraved plates.