These 5-pin pulse drives, 1 spare and 2 original, were leftovers long ago from a warranty replacement for a malfunctioning Vixen/Celestron Skysensor and drives--it turned out to be the computer. So these drives are guaranteed to work perfectly or your money back. Also includes the Super Polaris sculpted aluminum end housings that completely enclosed the drives around the clutches, and miscellaneous cabling. All Dark green and in very nice condition. I do not know if they were the same as the 2k version that came later.
Note added: There are two mounting hardware adapters now included that accept the dovetails built into the drives, and have several slots where they presumably bolt to the mount. Thus you could duplicate Skysensor capability to a mount not so equipped.
$95 for the 3 and all the above, shipped in CONUS, paypal encouraged, no photo.