It is a classic example of the backyarder's craft.
The Sunbeam Electric was sold here from 1960. A Sunbeam American design, it was made here too!
It's a mower I love for its ingenuity: double rotor, driven by toothed belts, and having 4 swing-back blades.
It's downfall ... it could not be fitted with a catcher, because it had two, opposed discharge chutes. [corrected with the later model]
Enter an unknown - initials, D. B. - who decided he/she wanted and desired twin catchers. These are fabricated to make the mower look like a weird Australian creek, river and swamp creature. The machine could also act as top-hat boxes in the off-season... or perhaps giant salt and pepper shakers. Fantastic!
Kye, these are the true 'eccentric' backyard mowers.