Bet you half a peach these were removed from someone's Marantz, and replaced as suggested in Audio Amateur over 35 years ago, with series resistors to make up for the selenium voltage drop. Heck, that's when I converted mine to silicon. Noticed absolutely no change in "timbre" or anything else. Maybe I'm a cloth-eared idiot. What I DID notice was an enormous improvement from wooly tone to estimable hi fi when the insterstage caps were changed from disc to film in the second to last stage.
$169, good for him, someone will pay it. I kept my old parts, maybe should borrow this guy's ad copy & flog 'em on the 'bay. Unless of course someone here wants 'em, I'll let 'em go for half that price. Convey that true timbre, it's important!