This sketch of comet Kohoutek was made on December 3, 1973, when the comet was magnitude 5.2 and had a tail 1 degree long in a 20 x 65 binoculars.
December 3, 1973. Bayswater, Western Australia. Naked eye limiting magnitude 4.5
Comet magnitude 5.2. Coma diameter 5 arc minutes; Tail length 1 degree
20 x 65 binoculars