These eyepieces were sold years ago by A Jaegers company for RFT telescopes. It is 64mm in diameter at the base. Field Lens is 52mm and eyelens is 47mm. It is 72mm high. Weighs over a pound.
These eyepeieces use rare earth glass lenses and have an excellent wide field flat to the very edge. This was used by me with a very large telescope that I no longer own. If you have a large telescope and want a wide field 32 mm EFL eyepiece you cannot get anything better. However, it is heavy, so it calls for a well mounted telescope. With a refractor it produces images that are breathtaking.
You must have a wide eyepiece end and will have to make a sleeve to adapt this to the scope. It is however of excellent quality.
$150 plus shipping and insurance.
The lenses alone are worth more. I believe it contains five.