Unstable Oglethorpe's Octagonal Lenses

Unstable Oglethorpe's Octagonal Lenses are what remains of Oglethorpe's Octagonal Lenses, which can no longer be crafted. Prior to Shadowlands, using this item "restored" it into a Linkgrease Locksprocket and 25 Sorcerous Water.

Source
The original version of this item, Oglethorpe's Octagonal Lenses, was crafted by engineers with a skill level of 1. The recipe was learned from Schematic: Oglethorpe's Octagonal Lenses, which could be purchased from the Engineering Works at Lunarfall or Frostwall, or from the engineering vendor in Stormshield or Warspear.