Copper, brass, and nickelsilver. But we might use only copper and brass in production. nickelsilver pattern is hard to control. Check the 1st pic, tail of the flashlight.
How about just nickel silver and copper? (my favorite combination
) - great contrast within the pattern, especially as the copper develops a wonderful patina...
Although in this the copper was also etched and the nickel silver polished, you can see the idea -- here in a Photon Fanatic light:
http://www.candlepowerforums.com/vb...r-amp-Flame-Colored-Copper-Mokume-Gane-Killer
And here, in George's very recent Nucleus, note the Mokume light after a short bit of time and the patina -- just brass and copper do not have as much contrast; you can see all three metals here in his light - scroll down to the Mokume one:
http://www.candlepowerforums.com/vb...Gane-Damascus)-Flashlight-and-Copper-Complete!
Hope you decide to keep the nickel silver in this light.
Perhaps the particular bar stock used in the sample did not have as much of the nickel silver consistently interwoven in the pattern, or as much nickel silver as other bars might. IMO the silver adds an important visual aspect.