Korath class

The Korath-class was a Klingon temporal science vessel timeship in the Klingon Defense Force during the 29th century. (Star Trek Online official website: Season 6 Dev Blog #29) In 2409, the Tholian Assembly utilized multi-dimensional phasing technology to penetrate the borders of spatial dimensions and the space-time continuum itself, allowing for the retrieval of future starships. This enabled the Lobi Crystal Consortium to sell Korath-class temporal destroyers to the Klingon Empire (STO website: Temporal Lock Box)

History and specifications
The Korath-class of ships was in service in the 29th century. The vessels crewed 250 officers and was equipped with a Tipler cylinder.