I had to have a second look at those photos, at first I thought it was an imperial! here is a pic for comparison...
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/10/full-2055-8089-dsc03923.jpg)
Anyhow I belive before the design went via victa - morrison - scott connar they derived from a old ransomes design.... I'll be damned if I can find the photo I have of it at the moment though....
Is yours belt or chain driven? I had a morrison of the same varant here once missing its reel but it was a belt drive, the imperial however was a chain driven mower.