Best tools to calibrate TT motor actual speed?


A fellow member, Lewm , was kind enough to sell me his old Walker motor controller for my Nottingham Analogue TT.
It is in good working order but now I find I need to acquire a method ,or tools may be best phrase , to calibrate my TT motor speed exactly.
Never having any adjustments available for TT motor speed it is not something I had given any thought to.

Lewm did mention a KAB strobe which uses a disc and a battery powered strobe.
Also a quick perusal reveals various manufacturers of marked platter discs where you would use a mains powered light ( to establish 60hz I assume) to check actual speed.
What does anybody here use or has used in the past that is easy, reliable, accurate and fairly priced?
Thank you
128x128uberwaltz
As always Al you hit the spot!

As I am a bit of a hoarder where tools are concerned I thought I had an old 90.s tungsten lamp automotive light and I did still working perfectly.
With that disc printed out and on the tt I was able to set both 33 and 45 speeds very accurately.
What was a nice reassurance was the 33 that I had set by ear to get me going was actually pretty darn close being just slightly fast.

Think I will keep the $110 in my pocket for now!
Just as a sanity check I think I will order one of those mat strobe discs in long lasting plastic for about $18 from Hudson HiFi and then recheck against my el cheapo printed version.
Useful any way as has strobe one side and two point alignment protractor on the other.
Seriously??
So am I, or near as darn it!
Fleming Island here.
Pm me maybe we can work something out.
As you may have read I got it pretty much dialed in but sure would be nice to double check with the KAB.
Thank you

Kevin