wow - what an amazing collection of sickle grinders - and great to put a face to the name of Mr. Irps and Mr. Blough.  Thanks for this thread.

I must find my way to at least one of these tool shows.

That is more grinders than I've ever seen at once, wow.   You can always tell the semi-pro guys, they bring their own shade.    Stoney I dug one of those out of the back of the old cattle shed, just slightly rusty, another ten years soaking and it would free up.  I thin JD had one too for the sickles.  Clamped across the mower frame.  I do collect hand crank grinders, if the price is right. 

in 35 year collecting tools i never seen a jd hand crank sickle grinder,  i do believe they came out with a electric model mid 50's.  i have been know tobe incorrect now and then though.  lets see one!!!

This is a really cool thread with some great old tools, thanks.