This F8.3 version of the Takahashi fluorite is no longer available, has the finest star test I have ever seen, and has no visible color error, superior to the faster F5.9 currently available. Virtually like new. Has the standard 1.25" focuser and compression ring. Includes the extra-cost Takahashi tube clamp. Has one curiosity, the metal serial number plate on the focuser was mismarked by Takahashi FC50 instead of 60.
The interferometric test report included, an assurance of quality not supplied by Takahashi, shows a superior wavefront test like an excellent TMB, APM or AP:
Peak-to-Valley: 1/8 wave (0.124 waves)
RMS, root-mean-square: 1/48 wave (.021)
$775, shipped, CONUS. PayPal preferred. I don't have a photo, but perfect condition.