Up for sale I have a used vintage Shimano 600 EX HP-6207 1" Threaded Headset 

In good condition. See photos. 

See last photo. I tried cleaning the headset and a lot of the dark speckles came off with ease. This will clean up nicely.

Crown race diameter is 27.0 (JIS)  /  cup diameters are 30.0

Brand: Shimano
Model: 600 EX HP-6207
Weight: 140 g
Year: 1985
Country: Japan

Fast shipping.

Thanks for looking.