Looks like a flycutter to me , albeit an early one, like an adjustable hole
saw.
"Sanjaya" wrote in message
k.net...
my memory is going... but for some reason I'm thinking
"spark tester"
used long ago for automotive and/or lawnmower engines.
not even sure why I'm thinking that... maybe my post
will jog some memories

"R.H." wrote in message
...
I'm trying to ID an unusual tool that might be used with radios, it's
number
140 on this site:

http://puzzlephotos.blogspot.com/



Thanks,
Rob