Vintage Mall chainsaw Sharpener info needed

[Jline2012]

I recently purchased this mall chainsaw sharpener. But can't seem to get much info on it. Can't figure out a price tag for it. It's a Mall chainsaw sharpener. Was located in Chicago IL.

 

[Jline2012]

Heres pic

 

[RTM]

My chainsaw sharpener has rounded blades. Not sure about older ones. My handsaws use 60 deg angle files. So kind of odd.

Mall patent info here.

Mall Tool Co. - Assigned Patents | VintageMachinery.org

Saw sharpener is here.

US Patent: 2,459,233 - Saw sharpener

US patent 2,459,233 Saw sharpener was issued to Arthur William Mall of Chicago, IL. It was granted on 01/18/1949. This machine sharpens chainsaw cutters.

www.datamp.org

 

[Jline2012]

Thanks I couldn't find anything on it. Other than a site of its history. Honestly gonna try and make a few bucks on it if it's worth anything.
Still fires right up when the switch is flipped
Looks like you can change the degrees. I'll take better picture