This doesn’t run, but is a pretty complete example of a mower. I’m not sure how many had the “flail mower” attachment? Maybe that was common?

https://inlandempire.craigslist.org/grd/d/moreno-valley-topeka-hiway-mower-hps5/7752409721.html

“Topeka Hiway Mower HPS5 with Flail Mower – Estimated Year: Late 60s – Early 70s
– Serial #2257 – 121.6 hours
* Unit Does Not Run *
* 4×4 Stick Shift
* 4 Cylinder Flat Head
* High/Low Transfer Case
* Front & Rear Differential
* Has pumps
* Willy’s running gear

Units were designed for off-highway mowing.”