Variegated - exhibiting different colors, especially as irregular patches or streaks; from the Latin variegatus "made of various sorts or colors.”
I've seen no mention in any vintage literature, except the Birmingham Proof House Report of 1891, of "chequered damascus". Certainly Bernard patterns are checkered, but I've also never seen a British gun with a Bernard pattern. Too "French" for the tradionalists?
The Mechanic’s Toolbook, 1868
https://books.google.com/books?id=3wA8AQAAMAAJ&pg=PA250&lpg…gun-barrels…present a variegated or watery appearance, as of white, silvery, or black lines, crossing, interlaced…
The Gunsmith’s Manual, 1883
https://books.google.com/books?id=4kxHAwAAQBAJ&pg=PT193&lpg The variegated appearance on gun barrels, produced by welding together metals dissimilar, as steel and iron…
W.W. Greener,
Modern Shotguns, 1891
https://books.google.com/books?id=FW8CAAAAYAAJ&pg=PA33&lpg“Variegated, or crolle Damascus…”
This probably is
3 rod "English machine-forged chequered Damascus"

I'll leave figuring out the
lopin to Bro. Culver

Unfortunately, and once again to our frustration and confusion, folks could call different patterns whatever they wanted
