Hello RWRBob
A warm welcome to these forums!
The
16" Rover Thoroughbred was Rover's answer to the Scott Bonnar 45 and Victa Imperial.
They were released mid 1970s and sold for about a decade (best guess).
This is an early one; because it has the Kirby motor. Most I have seen have been
fitted with the later Briggs engine.
Your machine has certainly been used, but the reel has good serviceable life in it.
Parts may be hard to come by.
I take it you have the plastic catcher?
Here is a record photo of a similar machine, showing the catcher and height adj. knob.
Hope this helps.-----------------------------
JACK.