I will revive this thread.

I have a 58cm Duracycle bought new about 12 to 13 years ago. It still has original black paint.

Lugged construction frame.
Suntour track dropouts
Sugino VP crankset for 130mm rings, 170mm cranks.
Serial number on seat tube above BB, right side.
Headset marked Hatta Sealed Japan.
Duracycle name on down tube and head tube.
Seat tube has a Made in Japan sticker and a "D" overlaying a diagonal stripe set that looks like a rainbow of colors. Same D and colored diagonal stripe on the head tube.
No tubing ID sticker. I do not remember removing such either.
Frame drilled for brakes front and rear. Requires medium reach brakes.
Araya 700C rims. No other ID on rims.
Suzue track hubs threaded one side only for fixed gear sprocket & lock ring.
Approximately 120mm rear width.
As I recall it came with MKS Sylvan track pedals and a steel track handlebar.

Probably not popular with the group but I currently have a 3 speed Sachs gear hub rear wheel installed and have a 5 speed SRAM P5 wheel in process. At my age better for town and country use. Also have a pair of 105 dual pivot brakes mounted, medium reach and some of the last available with the long bolts for old style external nut mounting so the frame and fork brake mounting holes have not been modified. I also have the original rear fixed gear wheel.