marantz 6300 tone arm weight

[triumph2002]

i recently purchased a 6300 and it came with a round chrome piece that screws into the back of the tonearm behind the tracking weight. it cant be used during play because it is so heavy. does anyone know what its used for?

[Alec124c41]

Many tone-arms had an auxiliary weight to be used with excessively heavy cartridges.

Cheers,
Alec