The Black Knight I believe was the BK-92. It's basically a no frills, cheaped down version similar to the MK-85. I guess they came out in 1992, (hence the 92). I know they weren't around real long...they went away when the LK-93 became the less expensive gun of choice.

If I remember right, they came in black on black only. It should have the #11 cap setup, and has a 1:28 barrel.

If its in good condition and the price is good, it will probably make a nice gun.