Thanks, yes, that's the rubber chevron double pin, and the detailing is really great. I get the feel that the track is too loose, so I may have to remove a link and see what happens. I have a set of single pin ordered for my Super Pershing, to make it totally correct.
I haveconverted this to an M-26A1 and aiming at late or post Korean war era. Both tracks were in Korea.

Bill