The Klingon Dk'Tahg class Dueler was the most common Klingon warship in the Empire throughout the 21st, 22nd, and 23rd Centuries up until the Federation-Klingon war (4-years war).
These small vessels were sturdy little ships that were used for both duels of honor between rival houses of the Klingon Empire, person duels of debts of honor, and as corvettes/interceptors within the various armadas of the Klingon houses.
When the Federation encountered these vessels in the late 22nd century on the fringes of Romulan space they gave these ships the code "D1" as per the standard Federation nomenclature (using A, B, C, D, etc.). All subsequent ships of the Klingon Empire that were encountered during the 22nd and 23rd Centuries were given a "D" designation and then a number for the individual ship class. It was only after the 4-years war that the Federation began classifying Klingon ships under their proper Klingon names (like K'tara class Bird of Prey or K'Tinga class battlecruiser), though models encountered during the war (like the Klolode class for the D7) still carried the "D" designation after the war.
The D-1 Dk'Tahg was the predecessor of the K'Tara class Bird of Prey that uses many of the same design principles as the Dk'Tahg. The K'Tara replaced the Dk'Tahg after the Klingons acquired cloaking technology from the Romulans in the late 2260s. The K'Tara also used a photon torpedo launcher (or plasma torp launcher on early models) in place of the magnetic pulse cannon.
Working on my first Klingon ship for my Star Trek: Classic Universe.
This one will take me some time as I'm trying to get the classic Klingon gray color scheme correct.
Here is the ship in layout.
Finally got the lighting correct.
I'm using the original 1966 lighting style which I got from these images and the original D7 Prop as my color palette guide for my Klingon ships.
Shown in show with lighting:2.bp.blogspot.com/-jmJekCSdKpI…
Added dual view of Lightwave modeler and layout for Chiletrek.