Hi Tim, and a warm welcome to the forum. We all like to learn new things and tinker here.
From a little research I've done I can tell you that the brand name is Kingcat and the model name of yours is the "Leopard". They also make a "Cheetah" and "Panther".
Here's some background info...Kingcat mowers are designed and built in New Zealand by HMF Mowers, a division of the Forlong and Maisey group of companies.
Kingcat was founded in Katikati, Bay of Plenty over 25 years ago. The aim then, as now is to design and build a range of ride-on mowers that stand apart from imported models by offering a long life, high productivity and low maintenance.
They do have a website, perhaps you could use the "Contact" page on the site and ask for a manual.
Hoping this helps, once again,
