Measurements for cabinet are W: 58cm (22¾") H: 128cm (4'2½") D: 32cm (12¾").
Yorkie, it is a hardboard back. I don't know if maybe the back was replaced. I remember this in my grandparents house when I was little. I do know that my 3 great, great uncles made furniture and had workshops in James Street behind Lloyd Street, so it's possible this was something they made. An elderly family friend who lives a couple of doors down from me has one very similar.