Anyone recognize the knobs on this?

http://cgi.ebay.com/Antique-vintage-FM-knob-Mallory-for-tube-radio-or-tv_W0QQitemZ120505037850QQcmdZViewItemQQptZVintage _Electronics_R2?hash=item1c0ea8f41a

Seller seems to have two of them or else he goofed and listed it twice.

What a cheap knob setup for a vernier dial! I don't recognize it, but those were used in Crosley, DuMont, Stromberg-Carlson, Capehart, Farnsworth, Fada, and many more. It could even be a Mallory factory-issue tuner for replacement or for experimental/home-builders/educational, and they just gave a set of cheap knobs?

Charles