This is the Cu DC1, a copper version of the DC1 light. The C145 develops a beautiful patina over time. The more you use it, the better it looks. Copper lights come with copper pills, a cigar box.
So here are some specs on this light.
Material: C145 Copper
Pill Material: Copper
LED: 3 Nichia 219cs 5000k
Optic: Carclo 10507
Modes: ML / L / M / H (with off-time memory)
Output on High: ~ 800 lumens
Cell: 1 18350 IMR Li Ion (included)
Weight (without battery): 152g
Driver also provides constant current control, low voltage warning, and reverse polarity protection