Dynamometre (+ - 50 gr ) to adjust iambic paddles such as Kent Bencher Begali Vibroplex Schurr Frattini IK1OJM Kent N2DAN K8RA etc etc.

Perfect conditions, New Old Stock, Tested, WYSIWYG. 
Made in France.

Ship worldwide by Registered (Signed For) Airmail.

Comments from around the world:

https://www.morsekey.net/dynamometer.html

'73 de ik6bak