looks like a vintage model BigRed! mine doesn't mention Columbia, just the VOL-TA-DROP Corp, VanNuys CA, and came in a more 'modern' lookin box
same thing tho - not sure if it was the filling station I got mine, they don't have a picture now of the one they offer [#FS-129 $30] - Chevs of the 40's has a
high tech one [part# 1119005 $76.25]
any other place I've seen has something like an ordinary ceramic resistor or larger coated one that looks wire-wound, and w/ prices around 4-8$, they're not good enuff - wonder if a marine supply might have'em?
Bill