Early 80's Tioga bear trap 2 have a stamped TANGE motocross locknut with a rubber O-ring on the underside, copper coloured cages with 18 balls and a gold colour lock washer. (light coloured box)some come with a crown race that is larger, like a built in dirt skirt to protect the bottom bearing but this is rare. Japan made
83 to about 90 have a stamped TIOGA nut with a rubber O-ring on the underside, normal coloured cages with standard amount of balls (12 i think) and a chrome lock washer. (light coloured box) Japan made
newer versions have a Tioga nut with an O-ring, the lock washer is thinner and a different pitch to the ones above and are not interchangeable. (light coloured box or black and blue box) Taiwan made
new versions have no stamping, no O-ring, not as nice quality, nice chrome though. (black/blue box) Taiwan made
You've got to look carefully before you purchase these, I've been caught out with this more than once.