Takahashi 76D RD reducer (TKA18580) in like new condition suits Takahashi FC refractors: FC-76DC/FC-76DS, FC-100DCU/FC-100DF , FC-100DZ, FC-76 and FS-78.
See:
https://www.testar.com.au/collection...-reducer-0-73x
Comes boxed with multiple system charts, $575 including express postage.