Do the Hustle

[AuburnCentral]

I was going through some boxes of stuff and found a Hustler that I did not know I had. These are all Athern belt drives. Does anyone know if there were any other colors, it appears that each color had its own engine number

 

[AuburnCentral]

Ok I googled it and dang there are more. Even saw one in a 40’s number then found some with no numbers and a variety of colors. I thought I was doing well with 4. I’ve only just begun lol