I'm probably wrong, but years ago I remember reading of a company that produced and marketed white line pads called the White Line Pad Company (or something very close?) When introduced White Line pads were offered as options by period makers to include LC Smith; and Charles Jerred's unfinished Deluxe grade had such a pad. Later, Frank Pachmyar purchased the White Line Pad Co and continued manufacture; but renamed his rubber pad the "Pachmyar White Line Pad", which name was molded into the rubber face.
I personally despise the looks of these pads, but tons were sold back in the day; and unfortunately were mounted onto some fine guns. I've often wondered how many Parkers ordered with skeleton butt plates now wear a White-line pad like the last example I owned, a 16-bore DHE with 32" barrels?
As to the aforementioned Marlin levers, I own a few Model 336 ADL's from the late 50's early 60's (those with high-grade Bishop stocks) and don't care at all for those hideous white spaces.
